The Budokan follows the curriculum for Yoshin Ryu Jujitsu set up by the International Federation of Yoshin Ryu Jujitsu. Having said that, all certificates come directly from the federation and are signed by the headmaster. The federation, however, does give each school the freedom to teach the art how they seem fit, with some stylistic variation.  

The methodology centers mainly around empty hand combat, employed primarily in a grappling manner in conjunction with focused blows to sensitive areas of the body. These techniques rely on leverage and spacial angular manipulation. The focus is self preservation against multiple attackers.     

The empty hand techniques are coupled with training in long sword (Daito), medium sword (Kodachi), and knife/short sword (Tanto), as well as 4ft staff (Jo) techniques. The longest weapon taught in this art is the halbert (Naginata), usually only taught after SanDan (Third Degree Black Belt).

History of the Style:

HISTORICALLY  Yoshin Ryu Jujitsu, the "School of the Willow Heart" or "School of the Willow Spirit," presumably founded by Akiyama Shirobei Yoshitoki, a physician from Nagasaki, is one of the Edo-period jujitsu schools that is best known here in the West. This style or ryu dates back to sometime before 1671. Yoshitoki felt that the jujitsu techniques he had learned were not sufficient in number, so he retreated to Tenmangu Shrine, where he devoted himself to meditation for one hundred days, during which time he developed 303 techniques of his own. One snowy day when Akiyama Yoshitoki was still on retreat in Tenmangu Shrine, he happened to notice a willow tree on the shrine grounds. Despite the recent heavy snows, this willow, unlike some of the other trees on the grounds, did not have even a single branch broken. The Willow branches simply yielded and allowed the snow to fall off, thereby saving the tree. This yielding principle was not only understood to be an essential element of the warrior arts of ancient Japan, but have been perfected through the test of time...Classical Fighting Arts of Japan,
A Complete Guide to Koryu Jujutsu