The Bujinkan (武人館) is one of the schools famous for teaching Ninjutsu, the Bujinkan in fact contains nine distinct koryuBudo, three of them are indeed Ninjutsu ryuha. It has dojos throughout the world. It is headed and operated by Dr. Masaaki Hatsumi and is one of the X-kan.
... almost all of their shows would have dedicated taping sections. The band allowed sharing of tapes of their shows, as long as no profits were made on the sale of their show ...