| Shurikenjutsu is a general term describing the traditional Japanese martial arts of throwing shuriken, which are small, hand-held weapons used primarily in Feudal Japan by warriors as the Samurai and Ninja. Some of these include metal spikes bo shuriken, circular plates of metal known as hira shuriken, and knives (tanto). Shurikenjutsu was usually taught among the sogo-bugei, or comprehensive martial arts systems of Japan as a supplemental art to those more commonly practiced such as kenjutsu, sojutsu, bojutsu and kumi-uchi (battlefield grappling) or jujutsu, and is much less prevalent today than it was in the feudal era.
The Meifu Shinkage-ryu (MSR) is a modern school of Shurikenjutsu. It was founded by Dr.Chikatoshi Someya in the 1970s. Someya was a student of Yoshio Sugino of the Katori Shinto-ryu, although the throwing style used in Meifu Shinkage-ryu is different. Someya refined the Katori style of throwing, making it shorter, faster and more concealed.
The Meifu Shinkage-ryu is a small school of about 30 students who train in Tokyo, Japan there is also branches of the school in Barcelona, Finland, Germany, Belgium and Italy with more developing under the guidance of the present Soke (head of the school), Yasuyuki Otsuka. It should be noted that this school is mostly composed of students of other martial arts that get attracted to these methods and Soke Otsuka teachings. Soke Otsuka welcomes students from any art or country. He calls himself a  "shuriken teacher and researcher". There is a specific kind of shuriken called a Meifu Shinkage-ryu shuriken, but Otsuka teaches and students will often practice throwing shuriken from many different schools, most of which are now extinct. 
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