Fujita Seiko Sensei  (1898 –1966)

He 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.

Fujita Isamu 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.  The Nakano base was to evolve extreme skills and an elite group of soldiers. 

Notable students besides Konishi Soke were Motokatsu Inoue Sensei, Mabuni Kenwa Sensei, Fujitani Masatoshi, actor Tomisaburo Wakayama Sensei and Manzo Iwata Sensei, who became heir to some of his styles. Fujita left no heir for Kōga-ryū Wada Ha.

Fujita Seiko 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 collection, the Fujita Seiko Bunko, is housed at Iga-Ueno Museum, Odawara Castle.