Hideyoshi Travel Guide Detailed Nishinomaru Garden: Sengan Yagura, Inui Yagura & Japan’s Only Gunpowder Storehouse
Osaka Castle's Nishinomaru Garden: Sengan Yagura & Inui Yagura (ICP 1620) + Japan's only stone gunpowder storehouse — personally visited. 9 spots, ¥200.