local history
Refers to the history of a specific region, town, or locality, often studied or compiled by local historians.
彼は郷土史の研究に熱心だ。
He is enthusiastic about researching local history.
この博
This museum has a wealth of materials on local history.
Compound of 郷土 (きょうど, 'native place, hometown') and 史 (し, 'history').