Post Office : Yashima Post Office [Not used now]
First day of use : Jan. 1, 1948 (Showa 23)
Last day of use : Mar. 24, 1993 (Heisei 5)
Postmark date : Sep. 10, 1991 (Heisei 3)
Prefectures : Kagawa


Reference: Ministerial Notification No. 382 of the Ministry of Communications (1947/12/27), Encyclopedia of Japanese Scenic Cancellations 1931-2017 Vol.2

Post Office : Uwajima Post Office
First day of use : Apr. 20, 1976 (Showa 51)
Postmark date : Apr. 1, 2021 (Reiwa 3)
Prefectures : Ehime


Reference: Encyclopedia of Japanese Scenic Cancellations 1931-2017 Vol.2

Post Office : Kotohira Post Office
First day of use : Jan. 1, 1948 (Showa 23)
Postmark date : Sep. 17, 1991 (Heisei 3)
Prefectures : Kagawa


Reference: Ministerial Notification No. 382 of the Ministry of Communications (1947/12/27)