Four characters - Kan Ei Tsu Ho / Blank. 24mm, 3.25 grams. Kameido, Edo, Musashi Province, cast around 1737-1739. Hartill 4.165.

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".