noun
vice-minister; deputy minister
Historical title in the ritsuryō system; not used in modern government. The reading たゆう is also attested but less common.
大輔は律令制における官職の一つで、省の次官にあたる。
大輔 was one of the official posts in the ritsuryō system, serving as the deputy minister of a ministry.
From Middle Chinese 大輔 (dà fǔ), meaning 'great assistant' or 'deputy'. The reading たいふ is the go-on pronunciation, while たゆう is a later shift.