10 February 1898
|Died||4 January 1966 (aged 67)|
Shingetsu-ryū ShurikenjutsuNanban Sattō-ryū Kenpō
|Notable students||Iwata Manzo|
Seiko Fujita (藤田 西湖, Fujita Seiko, 10 February 1898 – 4 January 1966), born Isamu Fujita (藤田 勇, Fujita Isamu), was a prominent Japanese martial artist, researcher and author. Regarded as the 14th and final heir to the Kōga-ryū Wada-ha Ninjutsu tradition, he was highly respected by his peers and a core member of Japan's classical martial arts community. 
Isamu Fujita was born in Tokyo, and studied Kōga-ryū Wada-ha (Ninjutsu) under the tutelage of his grandfather, Fujita Shintazaemon, 13th Soke of the Wada branch of Kōga-ryū Ninjutsu. He was educated at both Waseda and Meiji universities, and initially began his career at a newspaper company. He went on to study several other martial arts and was also noted as an author, researcher and collector of ancient scrolls. According to some references, "opinions are divided if he was a real ninja or a mere budō researcher."
During World War II, Fujita taught Koga Ryu Ninjutsu in the Army Academy of Nakano (Rikugun Nakano Gakkō). Fujita later worked as a government security specialist. In later years he was influential in teaching many traditional Japanese arts. Notable students include Motokatsu Inoue, Mabuni Kenwa, Saito Satoshi, Fujitani Masatoshi, actor Tomisaburo Wakayama and Manzo Iwata, who became heir to some of his styles. Fujita left no official heir for Kōga-ryū Wada Ha.
Seiko Fujita published Zukai Torinawajutsu showing hundreds of Hojōjutsu ties from many different schools, and several other texts on ninjutsu and martial arts. He died of cirrhosis of the liver at about the age of 68 and likely suffered from hereditary angioedema (which can preclude the practice of martial arts, although Fujita may have demonstrated the ability to overcome some disease symptoms). His vast collection of books, scrolls and historical documents, the Fujita Seiko Bunko, is housed at the Odawara Library in Kanagawa Prefecture. His collection of historical weapons, tools and attire were bequeathed to the Iga Ryu Ninja Museum in Mie Prefecture.
Title in Japanese kanji / Transcription of the Japanese title with occidental alphabet / Translation of the Japanese title / Year of publication
Translated into English in 2017 by Eric Shahan.
In 1972, a big part of this book has been translated in French by Jacques Devêvre, and published by the editions « Judo international », with the title : « Les points vitaux secrets du corps humain » (« The secret vital points of the human body »), then re-published in 1998, by « Budo editions », with the title : « L’art ultime et sublime des points vitaux » (« The magnificent and ultimate art of the vital points ») (with commentaries by Henry Plée)