誰が千葉さな子とデートしましたか？

千葉 さな子（ちば さなこ、天保9年3月6日（1838年3月31日） - 明治29年（1896年）10月15日）は、江戸時代末期（幕末）から明治にかけての女性。

北辰一刀流桶町千葉道場主・千葉定吉の二女。北辰一刀流小太刀免許皆伝、長刀師範。学習院女子科（後の女子学習院）舎監。漢字表記では坂本龍馬に与えた長刀目録に佐那と記述され、司馬遼太郎の小説でその表記を用いたため、この名称が一般化しているが、千葉家の位牌には佐奈と記されている。初名を乙女。

Sakamoto Ryōma (坂本龍馬 or 坂本竜馬; 3 January 1836 – 10 December 1867) was a Japanese samurai, a shishi and influential figure of the Bakumatsu, and establishment of the Empire of Japan in the late Edo period.

Sakamoto was a low-ranking samurai from the Tosa Domain on Shikoku and became an active opponent of the Tokugawa Shogunate after the end of Japan's sakoku isolationist policy. Under the alias Saitani Umetarō (才谷梅太郎), he worked against the Bakufu, the government of the Tokugawa shogunate, and was often hunted by their supporters and the Shinsengumi. Sakamoto advocated for democracy, Japanese nationalism, return of power to the Imperial Court, abolition of feudalism, and moderate modernization and industrialization of Japan. Sakamoto successfully negotiated the Satchō Alliance between the powerful rival Chōshū and Satsuma domains and united them against the Bakufu. Sakamoto was assassinated in December 1867 with his companion Nakaoka Shintarō, shortly before the Boshin War and the Meiji Restoration.