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