Commonly known as Maruya Sen(丸屋銭)
Many catalogs list the year of minting as the Shotoku period（正徳期）, but there are various theories regarding the actual minting date, and details remain unclear.
There is a record that states, “The Hōei Edo Kameido Sen(宝永江戸亀戸銭), commonly known as Maruya Sen, was produced in Kameido Village from Hōei 5 to Shotoku 2… 鋳銭重宝記(Book name),” but it is unclear which coin this refers to.
This page references “Anasen Nyumon Kanei Tsuho – new Kan’ei Tsuho –,” so we will introduce it as Maruya Sen.
The four characters of Kan’ei Tsūhō are all large. In particular, the “ko(コ)” in the character “tsū(通)” is large. Another characteristic is that the ‘kai(貝)’ in the character “hō(寶)” is also large.
There is also a similar coin called “Mimihiro or Mimijiro(耳白) Sen.” It is said to be a version of the “Shukuji Haibun KatsuEn(縮字 背文 濶縁)” coin with the “bun(文)” character removed.
The origin of the name is said to have come from either the wide outer rim of the coin, which evolved from “Mimi hiro,” or from the white outer rim.
Mimi…耳ear
Shiro…白white
