The definition of "Edokko" is famous by Kyoden Santo (1761-1816), and is quoted in "Monoshiri Encyclopedia" (page 79, published in 2016). The original text of this "Community Somagaki" is as follows (Iwanami Shoten, Vol. 59 of the Nihon Classical Literature, Vol. 59, "Yellow Spinning Books", published in 1958).
＞Looking at the golden fish tiger (Shachihoko), bathe the tap water in a hot spring, grow up at the knee, eat rice of Ogamizuki, and nanny parasol (Onba Hikarakasa) In the long (person), gold and silver Sasago Hajiki, and Mutsuyama (Michinokuyama). The water of the corner is also in the middle of the water, and the Daimon hits the corner mansion in Honmachi. From the root bone of Edokko (Kojiya Bone), the middle of the Japanese chopsticks that spans all things, if you look at it, you will be able to enter the Shinkaze and the new road of Isecho (Isete), enter the service population, and enter the public population. (Kanban) Supumukofu, black lattice, orran is always planted.
When I first read this, I caught my eyes on the part of "bathing tap water in hot water", and I was a little strange wonder why "water supply" became a requirement of "Edo kid". Regarding the situation around this area, Kafu Nagai wrote an essay called "Water of Well" (October 1876), and if you read this, you can understand the background well.
＞The water supply was called clean water in the Edo period, and it is a place for people to know that it was opened far away in the Meiryaku era. It is not surprising that there were two streams of Kanda and Senkawa in addition to Tamagawa in water supply. When I was a child, people around Otowa and Kohinata remember using Kanda Josui from the Edo period as it is. At the same time, in order to use the water supply at that time, he dug a well into a gutter where the water supply flowed, and pumped water in a bell tub attached to the tip of a bamboo pole.
Once upon a time in Edo, Josui had only flowed through the busy towns of Kyobashi, Ryogoku, and Kanda, and on the remote mountainside, even in places where it was in the passages of Josui, near Yotsuya and Sekiguchi, could not use it in a flood. Therefore, if you say that you are a man who uses hot water from tap water, you will be born in the busiest downtown area in Edo, and if you are not Kanda Myojin, you will be Sanno's shrine parishioner, so it is a place where you are proud of Edo Tsuko. (A long time ago, it was said that those who lived around Koishikawa, Ushigome, and around Akasaka Azabu will go to Edo when they go to downtown. ) （17－32）
If you read this, at the beginning of the Meiji era, you can see that those who lived around Koishikawa, Ushigome, and Akasaka Azabu said that they would go to Edo when they went to downtown.
