Choyobun was imposed a few times from the Shohei era of Emperor Gomurakami until just before the unification with the North Court by the Meitoku Treaty, which was applied mainly in the southern part of the Kinki region where the South Court had influence, such as the Kii Province, Izumi Province and Kawachi Province.
後村上天皇の正平(日本)年間から明徳の和約による北朝との合一直前まで何度か出され、紀伊国・和泉国・河内国など、南朝の勢力が強かった近畿地方南部を中心に適用された。