Definizione

• The twelve ancient Sen of Japan. They are as follows: 1. Wado Kaiho Issued in 708 A.D. 2. Mannnen Tsuho " " 760 " 3. Jingo Kaiho " " 765 " 4. Ryuhei Eiho " " 796 " 5. Fuju Jimpo " " 818 " 6. Showa Shoho " " 835 " 7. Chonen Taiho " " 848 " 8. Nyueki Jimpo " " 859 " 9. Jogwan Eiho " " 870 " 10. Kampel Taiho " " 890 " 11. Engi Tsuho " " 907 " 12. Kegen Taiho " " 958 "

Fonte

• Frey's Dictionary (American Journal of Numismatics, Vol. 50, 1916)

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