After his untimely death in 1969, his son Hanshi Zenpo Shimabukuro succeeded him as the head of Seibukan karate-do.

He is the Supreme Instructor & Technical Director and President of the International Okinawan Shorin Ryu Seibukan Karate-do Association which has branch dojos in over 18 foreign countries.

This version of the kata, along with the modified version of Fukyugata Ni, was developed in joint cooperation with some other Okinawan member systems (Rengokai and Okinawa Prefecture), as a representation of traditional Okinawan styles, mainly for joint demonstrations and exhibitions.

Miyagi sensei chose the name to promote self-esteem of the young people, their training spirit, especially because they were living in hard times due to the war.

Kyan Chotoku learned Seisan kata from Sokon Matsumura, the master of the Shuri-te branch.

This kata contains long distance techniques like rensoku tsuki geri, which are representative of the shuri-te style.

From several sources it is claimed that Ananku is Taiwanese in origin, and that Master Kyan brought it from Taiwan to Okinawa.

Also Wansu contains its trademark hard technique, the effective use of kataguruma (fireman’s carry) throw.

Passai is often explained as a low light or night fighting kata, because of its many sagurite (searching hand) techniques.

After this powerful start, the kata changes characteristics by making fast blocks and strikes with open hands to vulnerable points of human body.

Notable bunkai techniques include throwing, crane style strikes, and attacks toward weak joint areas.

Zenryo Sensei believed strongly that simultaneous block and counter techniques were of primary importance.

The movements of Wanchin kata demonstrate many of these types of techniques, taken from Passai, Seisan, Gojushiho, and Kusanku.

Many of the bunkai involve locking maneuvers, throws, all characteristic of close combat type of techniques.

He was also one of the foremost disciples of Master Chibana Chosin, as well as having the honor to know for many years, the famous Okinawan fighter, Choki Motobu.

Because Nakama Sensei was humble, modest and an honorable master of karate, his name did not become very well known in the modern day martial arts world.

Movements and bunkai of this kata have not been changed to fit the Seibukan form of techniques, and are preserved as Hanshi Shimabukuro learned them from Master Nakama.

In many Shorin-ryu styles, Naifanchi (Heishugata) acts as foundation to further kata (Kaishugata) like Sanchin in the Goju-ryu system.

The primary stance in this series of kata is kiba dachi, which emphasizes the strengthening of the legs and hips.

A distinct characteristic of the kata is the technique where the circular movement of the arms protects the head in a block, while simultaneously setting up the opening for the uraken.

The appearance of kata can be seen as simple, but from careful study and practice of the bunkai, it is very rich in techniques, and is seen as an effective fighting system.

The technique in Jion that addresses this type of attack is very effective in relieving oneself of a hair grab from an opponent.