The name means, literally, “one heart method”. As of 1989 there are 336 branches of Isshin-ryū throughout the world, most of which are concentrated in the United States
Isshin Ryu Karate is summed up in its kata, or formal practice methods, and the specific techniques used to punch (vertical fist) and kick (snapping kicks). In many of the various forms of the system, sixteen kata (eight empty-hand, three bo, two sai a bo-bo kumite kata, a bo-sai kumite kata and one tonfa kata) are agreed upon as composing Isshin-ryu. These Kata include original developments of the Master, and inherited kata from the parent styles.