How did Tokyo in the Edo period ensure access to water for millions of people? From the ukiyo-e "Aoisaka outside the Tiger Gate" to talk about what is Edo? What was the scene of Edo that first saw today when Tokugawa Ieyasu first came from scratch? The Kanto "plain" was originally a "wetland" in the Kanto region, and everywhere was "water" Sanke Yasuyasu traveled all over the Kanto to find "treasures" and embarked on two projects, both related to the construction of the city of Edo, both related to water, with a population of nearly 1 million in the 18th century, and solving the drinking water problem was the key to the dam in Hiroshige Gogawa's painting "Aoisaka Outside the Tiger Gate": The embankment that supported the Edo civilization Land Before the completion of the Tamagawa Aqueduct, where did tokugawa Ieyasu and Edo's drinking water come from? The 300-year-old reservoir has disappeared

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