05/06/2026
A CASTLE IN A MARSH
Last month, I briefly introduced the area in front of Tokyo’s Ueno Park just before the 1923 Great Kantō Earthquake turned it to ashes. It was a vibrant maze of geisha houses, rendezvous teahouses, and top-class restaurants, many with a breathtaking view of the lotus-filled Shinobazu Pond.
Before diving deeper into Ueno, I decided to go back in time to better understand how its unique culture emerged. My latest article explores how Tokyo, then called Edo, was established by the ambitious warlord Tokugawa Ieyasu (1543–1616).
Over a decade before becoming sh**un, he built a stronghold in what was then a marshy, low-lying wetland, far removed from the centers of power in Kyoto and Osaka. It was on the very edge of what the elite considered the civilized world.
In this challenging landscape, Ieyasu and his successors built a radically new social order that transformed Japan. Squeezed between the powerful forces unleashed by this new order and the natural splendor of Shinobazu Pond, Ueno’s unique culture was born.
This article explores Edo before Ieyasu’s arrival and what he built there.
The text, images, and the maps that I created show the Tokyo area in a way we very rarely get to see.
Find the link in the comments!
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The photo shows Edo Castle between 1872 and 1874. In the center is the Sakash*ta Gate; in the background, the Fujimi Yagura turret. Both still exist today. The massive castle, built in a marsh, was the heart of a new social order from which the unique culture emerged of Tokyo’s Ueno district.