ruler's private property; privy purse
Historical term referring to the personal treasury or private funds of a monarch or feudal lord. Rare in modern usage; encountered mainly in historical or literary contexts.
In the Edo period, the shogun's privy purse was managed separately from the shogunate's finances.
From Chinese 內帑 (nèitǎng), combining 內 (inside, private) and 帑 (treasury, storehouse). The exact historical derivation in Japanese is uncertain; the term appears in classical texts.