noun
prefectural share of bank deposit interest tax
A Japanese local government tax term; refers to the portion of national interest tax revenue allocated to prefectures. Domain-specific financial vocabulary.
See also: 利子
利子割は、預金の利子にかかる税金の一部が都道府県に配分される制度です。
Rishiwari is a system in which a portion of the tax on deposit interest is allocated to prefectures.
Compound of 利子 (interest) and 割 (share, proportion). The exact historical derivation is uncertain; the term is a modern financial coinage.