was a

Kunoichi is a Japanese term for . In popular culture, it is often used for female ninja or practitioner of ninjutsu (''ninpo''). The term was largely popularized by novelist Futaro Yamada in his novel in 1964. Although kunoichi have appeared in numerou ...

(female ninja) who is thought to have served the

Takeda clan The was a Japanese samurai clan active from the late Heian period until the late 16th century. The clan was historically based in Kai Province in present-day Yamanashi Prefecture. The clan reached its greatest influence under the rule of Taked ...

. ''竊奸秘伝書'', the 13 meters long ninjutsu scroll handed down in

Matsushiro Domain file:松代城(海津城) Matsushiro castle 2011.1.1 - panoramio (2).jpg, 300px, Matsushiro Castle file:Ryukoji05.JPG, Part of the Matsushiro domain's Edo estate, relocated to Kamakura and used as a hall at Ryuko-ji Temple was a Han (Japan), feud ...

introduced her as the founder of this school of ninja., p.237

Sanada clan The is a Japanese clan.Edmond Papinot, Papinot, Jacques Edmond Joseph. (1906). ''Dictionnaire d'histoire et de géographie du Japon''; Papinot, (2003)("Sanada," ''Nobiliare du Japon'', p. 52 DF 56 of 80/nowiki> retrieved 2013-5-3. The Sana ...

, the ''

daimyō were powerful Japanese magnates, feudal lords who, from the 10th century to the early Meiji era, Meiji period in the middle 19th century, ruled most of Japan from their vast hereditary land holdings. They were subordinate to the shogun and no ...

'' of Matsusiro domain was former retainer of Takeda clan and Umemura Sawano worked for him.

References

{{People of the Sengoku period, state=autocollapse 16th-century Japanese people Japanese ninjutsu practitioners Ninja 16th-century Japanese women Women in 16th-century warfare Women in 15th-century warfare Japanese women in warfare Women in 17th-century warfare Female wartime spies People of the Sengoku period