Japan

A well defined coin series with a definitive starting date, good references (except for the e-sen), robust market structure. Prices have been kind of stable for a while, the Japanese coin “boom” was back in the last millennium. Lot of pretty things. Copies and imitations have been part of the Japanese numismatic scene since the beginning, so circumspection and a return guarantee are good points to keep in mind when considering a purchase in this field.