RubyMoney/money — comment on commit 4e3fb3d2b2fa210be384705a6ed0dcb4eb47aab4
File:  line 0
By slbug:

Why so?

Subunit
1/100	sen
1/1000	rin

It's not used, but exists. Same thing as BYR, there is no cents (10 Br min), but it exists in money gem