So-called Mrs. Garasha Hosokawa (Tama AKECHI)'s signature on the envelop of her letter was only one character of 'ta'; Sugenin (her name was 'go'), the lawful wife of Hidetada TOKUGAWA, wrote a signature of 'go' on the letter to her elder sister, Jokoin.
いわゆる細川ガラシャ夫人（明智たま）の消息の上書の署名には「た」1字が書かれており、徳川秀忠の正室・崇源院（名はごう）が姉の常高院に宛てた消息でも「五」と自署している。