Seishinkai (聖心会) is an international organization for the promotion and teaching of Shitō-ryū Karate. It is now also considered a sub-style of
Shitō-ryū. Seishinkai is also an international shotokan karate organization based in the UK.
Seishinkai started as a dojo called Seishin-Kan, founded by Kokuba Kosei on June 6, 1943 in Osaka, Japan. The name Seishi-Kan comes partly from the Kanji for the temple located at the
end of the street where Sensei Kokuba lived, Shotennoji. The character Sho can be pronounced sho or sei and means "pure." He believed that true Karate-dō comes from the heart so
he called his dojo Seishin or "pure heart" dojo.
During World War II, many of the Okinawan Karateka who left their homeland came to Osaka and visited the home of their old friend, Kokuba Sensei. In return for room and board these men
often taught at the Seishin-Kan dojo and gave private lessons to Kokuba Sensei's young son, Kosho. The Seishin-Kan dojo became a well-known meeting place for budo men in Osaka and many of
the founders of Karate taught there.
Kokuba Kosei was a devoted student of Motobu Choki, and upon Motobu's death in 1947 he became the second Soke of Motobu's branch of karate, known as-ryu-kyu Motobu-ha Karate-do, and
Seishin-kan became the center of the new organisation, Seishin-kai, promoting this style.
In 1959, after the death of Kokuba Kosei, his only son Kuniba Shogo (Kosho) became the third Soke of Motobu-ha Karate-do, and the 1st Soke of Motobu-ha Shito-ryu Karate-do, a new style
that he created by blending Motobu's karate with Shito-ryu, which he learned from Kenwa Mabuni himself, and other styles that he was taught by the great masters who visited Seishin-kan.