Kogetsu often sent postcards to his house to notify his family of his safety, but his daughter remembers that Kogetsu did not send any postcards for a month during this time.
皐月はそれまで度々実家に葉書を送って安否を知らせていたが、このときは一ヶ月間葉書をよこさなかったと皐月の娘は述懐している。