逸いつ年ねん号ごう

noun

unofficial era name; apocryphal era name

A historical era name that was proposed or used locally but never officially adopted by the imperial court or government. Often encountered in academic or historical contexts.

• この古こ文ぶん書しょには、正せい史しには記き録ろくされていない逸いつ年ねん号ごうが使つかわれている。

  This old document uses an unofficial era name not recorded in the official histories.

• 逸いつ年ねん号ごうの研けん究きゅうは、地ち方ほうの歴れき史しを知しる手てがかりになる。

  The study of apocryphal era names provides clues to local history.