In November 1984, Tanemura Tsunehisa Shōtō-sōke established the
Genbukan Sekai Ninpō Bugei Renmei (GWNBF -
Genbukan World Ninpō
Bugei Federation), which is an organization that focuses on preserving
the authentic transmission of authentic Japanese ninpō bugei
(忍法武芸 - ninja martial arts).
In the GWNBF the curriculum is based on the ninpō sanjūrokkei (忍法三十六型
- 36 skills of ninpō). 
These skills are divided into two categories:
bugei jūhappan (武芸十八般 - 18 skills of martial arts) and the
ninja jūhakkei (忍身十八形 - 18 skills of the ninja).
Together, they form the 36
skills, but in reality there are much more than just 36 skills.
To learn ninpō bugei in the Genbukan Kusakage Dōjō (USA), one must first join the GWNBF as a member, and then learn the basics of ninpō taijutsu (忍法体術 - ninja body techniques). The other categories that one learns in the GWNBF are bōjutsu (棒術 - long and short staff arts), and bikenjutsu (秘剣術 - secret sword techniques).
The following are a few of the ryūha from which the GWNBF bases its knowledge from:
• Gikan-ryū koppōjutsu
• Togakure-ryū ninpō Tanemura-ha
• Gyokko-ryū kosshijutsu Tanemura-ha
• Kotō-ryū koppōjutsu Tanemura-ha
• Kumogakure-ryū ninpō Tanemura-ha
• Kukishinden Happō Bikenjutsu Tanemura-ha
• Tenshin Hyōhō Kukishin-ryū
• Hontai Kijin Chōsui-ryū Kukishinden dakentaijutsu
• Shinden Fudō-ryū Jūtaijutsu Tanemura-ha
• Shinden Fudō-ryū dakentaijutsu Tanemura-ha