These first square coins feature a Paulownia crest with 1 Shu (一朱) on the obverse and has Shozaburo Goto's [ja] signature engraved on the reverse.
The Two Shu (二朱金) coin was also struck in a gold square shape and circulated during the Edo period.
While technically the first "2 Shu" coins date to the 10th year of Genroku (1697), these had the same grade as Ōban and are included with that type of coinage.
The Tenpō Ni Shuban (天保二朱判) began to be minted on September 3, 1832, and entered into circulation on October 24 of the same year.
Man'en Ni Shuban coins circulated until the end of September 1874 when they were replaced by the newly adopted yen.