(aka jūnizeni) is a general term for 12 types of copper coins minted in Japan under the Ritsuryo system from 708 (Wadō 1st year) to 963 (Ōwa 3rd year).[1] All of the included coins are circular in shape, have a square hole in the center, and were worth 1 mon.
| Image | Inscription | Year of introduction (Julian calendar) | |||
|---|---|---|---|---|---|
| 和同開珎 | 和同開珎 | 708 | |||
| 萬年通寳 | 万年通宝 | 760 | |||
| 神功開寳 | 神功開宝 | 765 | |||
| 隆平永寳 | 隆平永宝 | 796 | |||
| 富壽神寳 | 富寿神宝 | 818 | |||
| 承和昌寳 | 承和昌宝 | 835 | |||
| 長年大寳 | 長年大宝 | 848 | |||
| 饒益神寳 | 饒益神宝 | 859 | |||
| 貞觀永寳 | 貞観永宝 | 870 | |||
| 寛平大寳 | 寛平大宝 | 890 | |||
| 延喜通寳 | 延喜通宝 | 907 | |||
| 乹元大寳 | 乾元大宝 | 958 |