coinage was inspired by the Tang coinage (唐銭) named Kaigen Tsūhō (Chinese: 開元通宝, Kai Yuan Tong Bao), first minted in Chang'an in 621 CE. The Wadokaichin

List of Japanese cash coins by inscription

emission occurred in 958, with very low quality coins called Kengen Taihō (乾元大宝), which soon fell into disuse. The last Kōchōsen coins produced after the

Suō Mint

this mint, from the Fuju Shinpō (ja:富寿神宝) in 818 to the Kengen Taihō (ja:乾元大宝) in 958. However, the coinage became strongly debased, with its metallic

Kocho Junisen

Shinpō [ja] 饒益神寳饒益神宝 859 Jōgan Eihō [ja] 貞觀永寳貞観永宝 870 Kanpyō Taihō [ja] 寛平大寳寛平大宝 890 Engi Tsūhō [ja] 延喜通寳延喜通宝 907 Kengen Taihō [ja] 乹元大寳乾元大宝 958

Japanese era name

The Japanese era name (Japanese: 元号, Hepburn: gengō, "era name") or nengō (年号, year name), is the first of the two elements that identify years in the

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Japanese currency