In the past, he made a remark with the content of 'I can never forget the following four dates, June 23 (the memorial day of Okinawa Prefecture commemorating all who died in the Battle of Okinawa), August 6 (Atomic-bomb Day of Hiroshima Prefecture), August 9 (Atomic-bomb Day of Nagasaki Prefecture) and August 15 (the anniversary of the end of World War II).
過去に「6月23日（沖縄県慰霊の日）、8月6日（広島原爆忌）、8月9日（長崎原爆忌）、8月15日（終戦の日）の四つは忘れる事の出来ない日付である」旨の発言もある。