A spring point on the west bank of Inokashira Pond in Inokashira Park, known as "Ochanomizu" (Tea Water) — a celebrated spring tied to Tokugawa Ieyasu. Tradition holds that during the Keicho era (1596–1615), Ieyasu used this pure water for tea during a falconry outing, giving rise to the name. Inokashira Pond was long known as "Nanai no Ike" (Seven Springs Pond), a renowned Musashino water source …

During the Keicho era (1596–1615), Tokugawa Ieyasu is said to have used this spring's water for tea during a falconry outing, giving it the name "Ochanomizu." Legend also attributes the name "Inokashira" to the third shogun Iemitsu. In 1629 the Kanda Josui aqueduct, drawing from this spring, was dev…