Imperial Palace Inui Street: Visiting the Usually Closed Inner Road
Inui Street is a hidden Imperial Palace route opened only in spring for cherry blossoms and autumn for fall foliage. From Sakashita-mon Gate to Inui-mon Gate, this guide explores a special walking route where the high stone walls of Edo Castle’s Honmaru, moats, and the deep woodland of Fukiage Gyoen come together.
🌸 Basic Information for the Inui Street Public Opening
Inui Street at the Imperial Palace is a special walking route opened to the public only twice a year, in spring and autumn. Stretching about 750 meters from Sakashita-mon Gate to Inui-mon Gate, the route has the high stone walls and moats of Edo Castle’s Honmaru on the right and the deep natural woodland of Fukiage Gyoen on the left. Though located in the heart of Tokyo, it is a rare historic landscape where Edo Castle’s stonework, water defenses, and Imperial Palace greenery can be experienced together. Along the route are layers of Edo Castle history: the hill where Momijiyama Toshogu, associated with the Tokugawa shoguns, once stood; Tsubone-mon Gate, an entrance linked to the Ooku women’s quarters; and Sakashita-mon Gate, the site of the late-Edo assassination attempt known as the Sakashita-mon Incident.
This page gives a detailed guide to the history, highlights, and access information for 11 spots, including Sakashita-mon Gate, Fujimi-yagura Turret, Hasuikebori Moat, Tsubone-mon Gate, Fujimi-tamon, and Inui-mon Gate, using photos from an actual visit.
Visit Report: Walking Inui Street in Early April, During Cherry-Blossom Season
Overview: In early April, I entered Inui Street through Sakashita-mon Gate just as the gates opened at 9:00 a.m. Many visitors were already lined up before opening time, and after a baggage check, we stepped onto a special route inside the Imperial Palace that is usually closed to the public.
Along the route, I saw Sakashita-mon Gate, Fujimi-yagura Turret, Hasuikebori Moat, Tsubone-mon Gate, Fujimi-tamon, Mon-nagaya, Dokanbori Moat, Nishihanebashi Bridge, Inui Moat, and Inui-mon Gate in order. The not-yet-fully-blooming cherry blossoms, massive stone walls, quiet water surfaces, and normally inaccessible gates and turrets came together in a rare experience of Edo Castle’s defensive design and beauty.
What left the deepest impression was the approach to the Ooku that can only be understood by standing on site, the pairing of Fujimi-tamon with cherry blossoms, and the grand stone walls around Inui Moat near the end of the route. Open the section below for the full photo report.
🌸 Arriving at Sakashita-mon Gate Before Opening
I arrived in front of Sakashita-mon Gate at 8:30 a.m. for the 9:00 a.m. opening. Many people were already in line. Alongside visitors from across Japan, I could hear tourists speaking different languages, a reminder that the appeal of the Imperial Palace reaches far beyond national borders.
🚪 Passing Through Sakashita-mon Gate
At exactly 9:00 a.m., the line began moving in an orderly way. The baggage check went smoothly, and the staff handled visitors politely. As Sakashita-mon Gate came closer, its imposing presence gradually became clear. This gate was used by shoguns and senior retainers in the Edo period, and because it is normally inaccessible, the closer I came, the more charged the moment felt.
🏯 Looking Up at Fujimi-yagura Turret
After passing through the gate, Fujimi-yagura Turret appears first on the right. The contrast between its white plaster walls and black roof tiles is beautiful, and seen through the cedar trees, it looks almost like a Japanese painting in a frame. It is one of the surviving turrets of Edo Castle, and as its name suggests, it is said that Mount Fuji could once be seen from here.
🌊 Hasuikebori Moat and the Cherry Blossoms of Inui Street
At last, I stepped into Inui Street itself. Hasuikebori Moat opened up on the right, and the quiet stone walls and water surface looked almost like an ink painting. The cherry blossoms were not yet at full bloom, but Somei Yoshino, weeping cherry, and wild cherry trees were beginning to open, carrying a faint sweetness on the breeze.
🏛 Tsubone-mon Gate: A Gate That Evokes the Women’s Quarters
After walking a little farther, Tsubone-mon Gate came into view. The word tsubone refers to the private rooms of women serving in the palace, and the name evokes the spaces occupied by women inside Edo Castle. Seeing the site in person after studying the layout of the Ooku and the daily spaces of its attendants changes the way the area around Inui Street appears.
🌸 Fujimi-tamon and Cherry Blossoms
Farther along, Fujimi-tamon appears proudly on the stone walls to the right. Seen through pale pink cherry blossoms blooming in front of it, the white walls and black tiles embody a kind of Japanese beauty. Quietness and brilliance coexist in this scene, leaving the impression of a single unforgettable painting.
🏘 Mon-nagaya and Dokanbori Moat
On the left appeared Mon-nagaya, a building I was seeing for the first time. Its dark brown walls carry a deep historical atmosphere, and the contrast with the cherry blossoms in front of it felt almost theatrical. Continuing farther, Dokanbori Moat opened into view. It bears the name of Ota Dokan, the renowned warrior who built the original Edo Castle here in the Muromachi period, long before Tokugawa Ieyasu entered Edo.
🌉 Nishihanebashi Bridge and Inui Moat
Nishihanebashi Bridge appeared on the right, marking the final stretch of Inui Street. Then Inui Moat opened before me: manicured lawn, dignified pine trees, and solemn stone walls. The space was so broad and quiet that it left me nearly speechless. On top of those stone walls once stood the main keep, a five-story, seven-layer structure about 44.8 meters high.
🚪 Toward Inui-mon Gate
Finally, Inui-mon Gate appeared in all its dignity. Normally it can only be seen from a distance around the outer perimeter, so being able to examine its details up close is another special experience of this public opening. The gate is said to have originally stood at Momijiyama and to have been moved here, and its historical weight still feels alive.
Stone walls, moats, cherry blossoms, turrets, and the memories of people who once moved through this landscape—it was more than sightseeing. It was a journey through time and space.
Detailed Guide to 11 Spots
Here is a detailed guide to the history, highlights, and access information for each spot, following the route from Sakashita-mon Gate, the entrance, to Inui-mon Gate, the exit.
Inui Street
Tracing the memory of Edo Castle’s western Honmaru and Momijiyama—a special Imperial Palace route opened only in spring and autumn
Inui-dori, or Inui Street, lies on the northwestern side of the Imperial Palace and is a historic route that once connected Edo Castle’s Honmaru and Kitanomaru. Inui refers to the northwest direction, which has long been regarded as auspicious. The route is normally closed, but it is specially opened to the public only during the spring cherry-blossom and autumn foliage seasons, attracting many visitors. With the grand defensive line of high stone walls and moats on the Honmaru side, deep woodland on the Fukiage Gyoen side, and the historic hill where Momijiyama Toshogu once stood, this is truly a “road once walked by shoguns,” where history and nature are in perfect harmony.
📜 Detailed Historic Site Data
| Development Period | Early Edo period, during Tokugawa Ieyasu’s development of Edo Castle |
|---|---|
| Category and Location | Northwestern area inside the Imperial Palace, connecting the Honmaru and Kitanomaru |
| Structure and Features | A straight route with high stone walls and inner moats on the right, the Honmaru side, and natural woodland on the left, the Fukiage Gyoen side |
| Related Facilities | Momijiyama Toshogu, founded in 1618 and removed after the Meiji Restoration; shogunal mausoleums, now removed; and a shogunal viewing area |
| Current Condition | The route, stone walls, and moats survive. Momijiyama Toshogu and the mausoleums no longer exist. |
| Public Access | Normally closed. Open only during special spring and autumn public openings. |
| Cultural Property Designation | Part of the Special Historic Site “Edo Castle Ruins” |
👀 Highlights
- Stone Walls and Moats of Edo Castle’s Honmaru: The high stone walls and water-filled moats rising to the right of the route convey both the defensive power and grandeur of Edo Castle.
- Natural Woodland of Fukiage Gyoen: On the left, deep woodland creates a rare quiet space in the middle of the city.
- Spring Cherry Blossoms and Autumn Foliage: The route is colored by cherry blossoms or autumn leaves during the public openings, and the chance to walk it only at those times gives the experience a special quality.
📌 Trivia
- Momijiyama Toshogu: In Genna 4 (1618), a shrine dedicated to Tokugawa Ieyasu was established on Momijiyama within Edo Castle, later becoming Toshogu. Shogunal mausoleums also stood on Momijiyama, making it an important ritual space for the shogunate. After the Meiji Restoration, the Tokugawa mausoleum area on Momijiyama was removed.
- Shogunal Viewing Area: Around Inui Street was a viewing area where the shogun observed martial arts and festivals, linking the area closely with the authority of the shogunate.
🗺 Address
1-1 Chiyoda, Chiyoda City, Tokyo
🚶 Access to Entrance
Enter from Sakashita-mon Gate. Sakashita-mon Gate is about 15 minutes on foot from Exit 6 of Nijubashimae Station (C10).
⏳ Suggested Time
Quick visit: about 30 minutes / In-depth visit: about 1 hour
💴 Admission
Free during the special public opening
Sakashita-mon Gate
A service gate for the Ooku and a historic gate that witnessed the turmoil of the late Edo period
Sakashita-mon Gate, the entrance to Inui Street, is known as the site of the Sakashita-mon Incident, in which senior shogunal councillor Ando Nobumasa was attacked by Mito ronin in 1862 (Bunkyu 2). During the Edo period, it stood near the Nishi-no-maru Ooku and was used as a service gate. Today it serves as an entrance used by the Imperial Household Agency, and visitors pass through it during the Inui Street public opening and public greeting events.
📜 Detailed Historic Site Data
| Construction Period | Edo period, shortly after the development of the Nishi-no-maru |
|---|---|
| Structure and Features | A masugata-style gate compound composed of a Koraimon gate and a turret gate. It originally had a wooden bridge, but today it is approached by an earthen bridge. |
| Current Condition | Survives and is used as an Imperial Household Agency entrance. |
| Cultural Property Designation | Part of the Special Historic Site “Edo Castle Ruins” |
| Historic Incident | 1862 (Bunkyu 2), Sakashita-mon Incident: senior shogunal councillor Ando Nobumasa was attacked and wounded by Mito ronin. |
👀 Highlights
- Hamaguri-bori Moat: The moat to the right of Sakashita-mon Gate has beautiful curving stone walls and combines Edo Castle’s defensive function with a strong sense of aesthetics.
- Masugata Gate Structure: The square compound formed by the Koraimon and turret gate preserves the characteristic defensive design of Edo-period castle gates.
📌 Trivia
- Sakashita-mon Incident of 1862: Ando Nobumasa, the senior councillor who promoted the Ansei Purge, was attacked by six Mito ronin. He survived but resigned as senior councillor, making the incident one of the turning points in late-Edo politics.
- Origin of the Name: The name comes from its location at the bottom of a slope descending from the Nishi-no-maru.
🗺 Address
1-1 Chiyoda, Chiyoda City, Tokyo
🚶 Access
About 15 minutes on foot, approx. 650 m, from Exit 6 of Nijubashimae Station (C10) or Exit D2 of Otemachi Station (I09)
⏳ Suggested Time
About 5 to 10 minutes
💴 Admission
Free during the public opening
Fujimi-yagura Turret
Edo Castle’s only surviving three-story corner turret—seen from Inui Street as a substitute for the lost keep
Fujimi-yagura Turret is one of the few surviving buildings of Edo Castle and is a three-story corner turret. After the main keep burned down in the Great Fire of Meireki in 1657 and was never rebuilt, this important structure effectively functioned as a substitute for the keep. During the public opening of Inui Street, visitors have the rare chance to look up at it closely from the opposite side of the moat—an angle not available from the Imperial Palace East Gardens.
📜 Detailed Historic Site Data
| Structure | Three-story corner turret standing on stone walls |
|---|---|
| Current Condition | Survives as one of the few remaining buildings of Edo Castle. |
| Role | Functioned as a substitute for the main keep after the keep burned down in the Great Fire of Meireki in 1657. |
| Cultural Property Designation | Part of the Special Historic Site “Edo Castle Ruins” |
| Notes | Can be viewed up close during the Inui Street public opening. Normally it can only be seen from a distance. |
👀 Highlights
- A Special Angle from Across the Moat: Fujimi-yagura can also be seen from the Imperial Palace East Gardens, but the close view across the moat from Inui Street is available only during the public opening. The impact is completely different.
- A Spring Scene Like a Japanese Painting: Seen through cedar trees, Fujimi-yagura looks as though it has been framed inside a Japanese painting.
📌 Trivia
- Origin of the Name: The name Fujimi, meaning “Fuji view,” is said to come from the fact that Mount Fuji could once be seen from this spot.
- Why the Main Keep Was Not Rebuilt: After the Great Fire of Meireki, the main keep was not rebuilt for reasons that may have included financial strain and political judgment. Fujimi-yagura filled that symbolic gap.
🚶 Access
Visible along the route after entering through Sakashita-mon Gate during the Inui Street public opening.
⏳ Suggested Time
About 5 to 15 minutes
💴 Admission
Free during the public opening
Hasuikebori Moat
The western Honmaru moat where lotuses once bloomed and Fujimi-tamon reflected on the water
Hasuikebori Moat lies on the western side of the Honmaru and is said to have once been filled with beautiful blooming lotus flowers. As you walk along Inui Street, the moat spreads out on your right, and many visitors stop to admire the scenery created by its high stone walls and quiet water. The precise stonework is proof of a level of craftsmanship that has withstood centuries of wind and rain without collapsing.
📜 Detailed Historic Site Data
| Development Period | Early Edo period |
|---|---|
| Location | Western side of the Honmaru, inner moat |
| Name Origin | The name derives from the lotuses that once bloomed in the moat. |
| Adjacent Structures | Fujimi-tamon, surviving building, and Nishihanebashi Bridge |
| Current Condition | The moat, stone walls, and Fujimi-tamon survive. The lotuses are no longer present. |
👀 Highlights
- Harmony of Stone Walls and Water: The refined stonework of Hasuikebori Moat is a highlight in itself. Together with Fujimi-tamon, the view changes with the light in the morning and evening.
- Cherry Blossoms in Spring: In early April, cherry blossoms around the moat appear to drape over the stone walls, creating one of Inui Street’s finest spring scenes.
🗺 Address
1-1 Chiyoda, Chiyoda City, Tokyo
🚶 Access
About 4 minutes on foot from Sakashita-mon Gate (approx. 230 m)
⏳ Suggested Time
About 5 to 10 minutes
💴 Admission
Free during the public opening
Tsubone-mon Gate
The official entrance to a women’s space, used daily by attendants serving in the Ooku
Tsubone-mon Gate stands quietly on the western side of the Honmaru. It was once a service gate used daily by women working in the Ooku. Many visitors may not know of its existence until they stand here in person, and the site offers the kind of realization that cannot be gained from maps alone.
📜 Detailed Historic Site Data
| Use | Service gate for women attendants, tsubone, serving in the Ooku |
|---|---|
| Name Origin | Derived from tsubone, a term associated with women’s offices and living spaces |
| Structure and Features | A simple but dignified wooden gate, distinctive as a gate associated with women’s access. |
| Current Condition | Survives, normally closed to the public |
| Notes | Visible only during the Inui Street public opening |
📌 Trivia
- A Story Connected with Kasuga no Tsubone: A tradition says that Kasuga no Tsubone once broke curfew, was turned away at Tsubone-mon Gate, and spent the night outside. It is said that this incident further increased her influence.
- A Gate for Women: It is described as a rare gate associated specifically with women’s access inside Edo Castle and is said to have been managed differently from ordinary security gates.
🚶 Access
About 6 minutes on foot from Sakashita-mon Gate (approx. 350 m)
⏳ Suggested Time
About 5 to 10 minutes
💴 Admission
Free during the public opening
Mon-nagaya
The essence of samurai residence architecture, where status and daily life formed one structure
Mon-nagaya is a form of samurai architecture in which the main gate and the residential longhouse spaces extending from both sides were integrated into one structure. The dark brown walls and elongated form convey both the status and the practical functions of a warrior residence. During the Inui Street public opening, it can be seen together with nearby cherry blossoms, creating a memorable contrast of architecture and season.
📜 Detailed Historic Site Data
| Architectural Style | Mon-nagaya, an integrated structure combining a main gate with longhouses on both sides |
|---|---|
| Use | Residence and guard facility for gatekeepers, lower-ranking samurai, and servants |
| Current Condition | Survives, normally closed to the public |
| Notes | Visible only during the Inui Street public opening |
📌 Trivia
- Life and Security Combined: The building was both a living space for gatekeepers and lower-ranking samurai and a place where security and management were carried out day and night. The structure reveals aspects of Edo-period social order.
- Connection with the Laws for the Military Houses: Under the Laws for the Military Houses established by Tokugawa Ieyasu, gate styles were regulated according to status, and gates exceeding a family’s rank could be ordered dismantled.
🚶 Access
About 7 minutes on foot from Sakashita-mon Gate (approx. 420 m)
⏳ Suggested Time
About 5 to 10 minutes
💴 Admission
Free during the public opening
Dokanbori Moat
A moat named after Ota Dokan, the warrior who laid the foundation of Edo Castle’s oldest historical layer
Dokanbori Moat is named after Ota Dokan, the late-Muromachi-period warrior who built the original Edo Castle long before Tokugawa Ieyasu entered Edo. There is a special thrill in feeling connected to a historical figure through the name of a place or structure—something that ordinary sightseeing alone cannot provide. Beyond the trees on the left side of this moat once stood Momijiyama Toshogu.
📜 Detailed Historic Site Data
| Name Origin | Named after Ota Dokan, the builder of Edo Castle in the late Muromachi period |
|---|---|
| Alternate Names | Kami-Dokanbori and Shimo-Dokanbori |
| Current Condition | Survives and can be visited during the public opening |
📌 Trivia
- Memory of Momijiyama Toshogu: Beyond the trees to the left of Dokanbori Moat is the area where Momijiyama Toshogu once stood inside Edo Castle. Comparing the present landscape with Edo-period maps on a smartphone can create a powerful sense of past and present joining together.
- Who Was Ota Dokan?: Ota Dokan was a Muromachi-period warrior and poet who built Edo Castle in 1457 (Choroku 1). The foundation for Tokugawa Ieyasu’s later shogunate began with this earlier castle site.
🗺 Address
1-1 Chiyoda, Chiyoda City, Tokyo
🚶 Access
About 9 minutes on foot from Sakashita-mon Gate (approx. 480 m)
⏳ Suggested Time
About 5 to 10 minutes
Fujimi-tamon
A long surviving tamon turret of Edo Castle—white walls and black roof tiles viewed through cherry blossoms, one of Inui Street’s finest scenes
Fujimi-tamon is a long tamon turret, a storehouse-like longhouse structure, standing beside Hasuikebori Moat. The contrast between its white walls and black roof tiles shines against the water, giving it a striking visual presence among the surviving structures of Edo Castle. On my previous visit, I could only glimpse it faintly from an angle, but this time I was able to see it proudly from the front—one of the privileges available only during the Inui Street public opening.
📜 Detailed Historic Site Data
| Building Type | Tamon turret, a storehouse-like longhouse building |
|---|---|
| Location | On the stone walls along the north bank of Hasuikebori Moat |
| Structure | A long building with white walls and black roof tiles |
| Current Condition | Survives and can be viewed from the front during the Inui Street public opening. |
👀 Highlights
- Japanese Beauty Through Spring Blossoms: In early April, the pale pink cherry blossoms in front of Fujimi-tamon make the scene a symbol of Japanese beauty, where calmness and splendor coexist.
- The Impressive Length of a Tamon: Unlike a compact corner turret, the long, continuous form of a tamon is striking. The repeated white walls and reflections on the water are the essence of castle beauty.
🚶 Access
Visible along the route during the Inui Street public opening.
⏳ Suggested Time
About 5 to 10 minutes
💴 Admission
Free during the public opening
Nishihanebashi Bridge
A drawbridge connecting the Honmaru and Nishi-no-maru—the final defensive line that could be cut off in an emergency
Nishihanebashi Bridge was an important bridge connecting the Honmaru and Nishi-no-maru. It once functioned as a drawbridge that could be raised in an emergency to block passage. The carefully stacked stone walls still carry the skill and spirit of the craftsmen who built them. It is a place worth more than a passing glance.
📜 Detailed Historic Site Data
| Bridge Type | Former drawbridge, raised in emergencies to block passage; today an earthen bridge |
|---|---|
| Role | Connected the Honmaru and Nishi-no-maru and served as a final defensive line for the Honmaru in emergencies. |
| Current Use | Used today as a vehicle entrance for members of the Imperial Family; public access is restricted. |
📌 Trivia
- Defensive Function of a Drawbridge: Like Kitahanebashi-mon Gate, it could be raised during an emergency to cut off passage and defend the Honmaru. It played the role of a final defensive line.
- Used Today by the Imperial Family: Today, Nishihanebashi Bridge is used as a vehicle entrance for members of the Imperial Family, and public access is limited.
🗺 Address
1-1 Chiyoda, Chiyoda City, Tokyo
🚶 Access
About 10 minutes on foot from Sakashita-mon Gate (approx. 530 m)
⏳ Suggested Time
About 5 to 10 minutes
Inui Moat
The northwestern defense between the Honmaru and Nishi-no-maru—an auspicious moat bearing the name Inui
As the walk along Inui Street nears its end, Inui Moat opens into view. The well-kept lawn, dignified pine trees, and solemnly rising stone walls create a breadth and quietness that can leave visitors speechless. On top of these stone walls once stood the main keep, a five-story, seven-layer structure about 44.8 meters high.
📜 Detailed Historic Site Data
| Location | Northwestern side of the Honmaru, near the former keep base |
|---|---|
| Role | Part of the inner moat system separating the Honmaru and Nishi-no-maru |
| Name | Inui refers to the northwest direction, traditionally regarded as auspicious. |
| Current Condition | Moat and stone walls survive and can be viewed during the public opening. |
👀 Highlights
- Wide View Near the End of the Route: The open space of the moat, lawn, pines, and stone walls creates one of the most expansive scenes on Inui Street.
- Memory of the Main Keep: The stone walls in this area are connected with the memory of the main keep that once towered above Edo Castle.
🗺 Address
1-1 Chiyoda, Chiyoda City, Tokyo
🚶 Access
About 12 minutes on foot from Sakashita-mon Gate (approx. 650 m)
⏳ Suggested Time
About 5 to 10 minutes
Inui-mon Gate
An exit gate moved to the site of a shogunal viewing area—the endpoint of the Inui Street walk
Inui-mon Gate, the endpoint of the Inui Street walk, was established in 1888 (Meiji 21) by moving the former Nishi-no-maru rear gate, known as Momijiyamashita-mon Gate, to this location. Normally the gate can only be seen from a distance around the outer perimeter, so being able to view its details up close is an experience unique to this public opening. When you step outside Inui-mon Gate, the scenery you have just walked through—stone walls, moats, cherry blossoms, and turrets—returns to mind like a single film.
📜 Detailed Historic Site Data
| Relocation Year | 1888 (Meiji 21) |
|---|---|
| Former Name | Former Nishi-no-maru rear gate, Momijiyamashita-mon Gate |
| Edo-Period Context | The gate is near Momijiyama and ceremonial spaces inside Edo Castle, making it important for understanding shogunal ceremonies and movement routes. Notes about the shogunal viewing area may be added when confirmed by on-site signage or primary sources. |
| Current Use | Imperial Palace service gate and exit gate during the Inui Street public opening. |
| Notes | The public-opening route runs from Sakashita-mon Gate, entrance, to Inui-mon Gate, exit. |
📌 Trivia
- Site of a Shogunal Viewing Area: The area around Inui-mon Gate once included a place where the shogun watched festivals and martial arts. Standing here while sensing the weight of the gate evokes the authority of the former shogunate.
- Access to Takebashi Station (T08): After leaving through Inui-mon Gate, Takebashi Station (T08) on the Tokyo Metro Tozai Line is about 5 minutes on foot. If you are combining this route with the Imperial Palace East Gardens, you can also return toward Otemachi.
🗺 Address
1-1 Chiyoda, Chiyoda City, Tokyo
🚶 From the Exit
About 5 minutes on foot to Takebashi Station (T08) on the Tokyo Metro Tozai Line
⏳ Suggested Time
About 5 to 10 minutes
💴 Admission
Free during the public opening
Open the map to check the location of Inui-mon Gate and the nearest station.
Inui Street Walking Map (Special Public Opening Only)
Frequently Asked Questions (FAQ)
Recommended Reading: Imperial Palace and Edo Castle Guides
After visiting Inui Street, the Imperial Palace public tour and the Imperial Palace East Gardens are also highly recommended. Fujimi-tamon and Fujimi-yagura Turret, which you see from Inui Street, can also be viewed from a different angle inside the East Gardens.
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※ The information in this guide is current as of the time of writing. Opening periods, access information, and other details may change. Before visiting, please check the latest information on the Imperial Household Agency website (https://www.kunaicho.go.jp/event/inuidori.html).
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