The earliest possible date for the diary's last entry is said to be April 14, 953; however, as this is a date one year and a half prior to the death Imperial Prince Shigeakira (the Imperial Prince passed away on October 18, 954), the possibility that which he did not make any entries in his diary during this period may be significantly low (Morosuke FUJIWARA, who was a court noble contemporary with Imperial Prince and also his farther-in-law, made entries in his diary until two days before his death).
これらのことから、親王は天暦7年10月13日迄日記を筆録していたことがわかるが、いつを下限とするかは明確ではない。