genshi kahei / buppin kahei · commodity or contextual
No fixed numeric valueValue systems
Japan Denominations and Accounting Units
Counted mon, ryo fractions, silver weight units, decimal yen, sen and rin, and modern commemorative face values without false equivalence.
Contextual and proto-currency
Counted cash
mon · counted
1 monyon mon · counted
4 monhyaku mon · counted
100 monDeclared ryo-system denominations
ryō · declared gold denomination
1 ryobu · declared gold or silver denomination
0.25 ryoshū · declared gold or silver denomination
0.063 ryoWeight accounting
monme · weight accounting unit
3.75 grams-approximateDecimal yen system
rin · decimal face value
0.001 yensen · decimal face value
0.01 yenhan sen · decimal face value
0.005 yengo sen · decimal face value
0.05 yenjussen · decimal face value
0.1 yengojussen · decimal face value
0.5 yenichi en · decimal face value
1 yen→五円 · ごえん5 yengo en · decimal face value
5 yen→十円 · じゅうえん10 yenjū en · decimal face value
10 yen→五十円 · ごじゅうえん50 yengojū en · decimal face value
50 yen→百円 · ひゃくえん100 yenhyaku en · decimal face value
100 yen→五百円 · ごひゃくえん500 yengohyaku en · decimal face value
500 yen→Commemorative face values
sen en · commemorative face value
1,000 yenichiman en · commemorative face value
10,000 yengoman en · commemorative face value
50,000 yenjūman en · commemorative face value
100,000 yenA monme is a weight-accounting unit, a ryo belongs to a declared gold relationship, and a yen is decimal face value. Their numeric fields cannot be compared without period and system context.
Evidence
Sources and scope
These links support the claims on this page. Source authority does not imply permission to republish source images.
Ancient through modern chronology, Tokugawa tri-metallic system, Kanei Tsuho, koban, Meiji yen transition.
Open sourceNew Currency Act, yen/sen/rin relationships, historical unit explanations.
Open sourceCurrently issued and valid older coin designs, first issue years, compositions, diameters, and weights.
Open source