Under the Kenmu Restoration after the fall of the Kamakura bakufu, Chikamitsu was appointed the officer of the Onshogata (the Reward Office which was the administrative organ of the Kenmu Restoration, responsible for granting military awards called 'onsho') and the Zasso ketsudansho (the Miscellaneous Claims Court which was the central judicial organ of the Kenmu Restoration).
鎌倉幕府滅亡後の建武の新政では恩賞方、雑訴決断所の役人に任じられる。