The Hirakawa River runs alongside the Imperial Palace and was once part of the outer moat of Edo Castle during the Tokugawa shogunate. Back then, this area was a key part of the city’s defenses, surrounded by samurai residences and watchposts. After the Meiji Restoration, the surrounding land shifted from military to government use, with ministries and public offices taking root nearby.

Today, the river is a peaceful stretch of water in the heart of Tokyo. Though office towers and busy roads are close by, the river still offers a quiet break from the noise. Stone walls, old bridges, and tree-lined paths remind visitors of the city’s long history. In spring, cherry blossoms reflect in the water; in autumn, golden leaves drift along its surface. It’s a simple but meaningful place—perfect for a walk, a moment of rest, or a glimpse into Tokyo’s past.