Four characters - Kan Ei Tsu Ho / Blank. 24mm, 2.90 grams. Kawajiri-Muta, Akita, Dewa Province, cast around 1738-1750. Hartill 4.167.

Most Japanese coins are very rare. These coins are, however, common - they were inspired by the Ming dynasty cash from China. "Kan Ei Tsu Ho" means "Universal Treasure of Kan Ei".