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Isn't Tsukuda Island also a castle of Edo Castle? ？
Last time, Hamarikyu wrote the theory of Edo Castle's departure, but this is almost true. I speculate that Tsukuda Island, located at the mouth of the Sumida River since Edo, also played the role of the castle of Edo Castle. The history of Tsukuda Island is quite complicated, but I will introduce it easily and easily.
It is only a guess, but it seems that this island existed at the mouth of the Sumida River before the Edo period. It came to be called Tsukuda Island in the early Edo period. The general at that time was Ieyasu Tokugawa. Let's go back a little.
The time was June 1582 (1582). Akechi Mitsuhide defeated Nobunaga Oda. At that time, Ieyasu was watching and listening to Sakai in Osaka. "It's bad, I might be defeated in the future," he said. I decided to escape to Hyogo without returning directly to Mikawa. I had to cross the Kanzakigawa (diversion of the Yodo River), but I was lucky and stuck in large water. At that time, fishermen from Tsukuda-mura, Settsu-kuni (Tsukuda-cho, Nishiyodogawa-ku, Osaka-shi) put out fishing boats and helped Ieyasu. ※There are various theories on Ieyasu's route.
Ieyasu, who won the battle of Sekigahara, opened the Shogunate in Edo. 33 fishermen from Tsukudamura, the benefactor of life, have been brought to Edo. As a prize, the Shogunate gives the people of Tsukuda Village a first-class island and fishing ground at the mouth of the Sumida River. This island was named Tsukuda Island after the fisherman's hometown. Yes, this is the beginning of Tsukuda Island. That's a good idea.
From here, my guess. Isn't there anything behind giving this land, which is geographically important to the people of Tsukudamura? 。 Fishermen seem to have also served as secret envoys in the winter and summer camps of Osaka. In other words, I guess you may have had some military training. So, I wonder if Tsukuda Island can be regarded as the origin of Edo Castle. It's just a guess.
By the way, let's also introduce the relationship between Tsukuda Island and Tsukiji.
Do you know Tsukiji Honganji? This temple of the Jodo Shinshu sect was founded near Asakusa in 1617, but was burned down by the great fire of the Meiryaku era in 1657. An alternative land was given in the sea off Hatchobori. It was the Jodo Shinshu monks living on Tsukuda Island who worked hard to reclaim it. In fact, in the garden of Tsukiji Honganji, there is also Tsukuda Chubei Hoon Tower, the first village headman of Tsukuda Island. The area around Tsukiji Honganji was named "Tsukiji" in the sense of a newly created land.
By the way, the story returns to Tsukuda Island, but the time has changed and the end of the Edo period. It is a famous story that Odaiba was built off the coast of Shinagawa during the arrival of Kurofune. Approximately 10 years later, in the first year of Genji (1864), a battery was built on the south side of Tsukuda Island as a defense facility in Edo Bay. It is said that it was almost square, about 70m east-west and about 72m north-south. This is a rare story, isn't it? You can use it for tavern talk.