By 1929, Mabuni had moved to Osaka on the mainland, to become a full-time karate instructor of a style he originally called Hanko-ryū, or 'half-hard style'. In an effort to gain acceptance in the Japanese Butokukai, the governing body for all officially recognised martial arts in that country, he and his contemporaries decided to call their art 'Karate' or 'Empty Hand', rather than 'Chinese Hand', perhaps to make it sound more Japanese. Around the same time, perhaps when first introducing his style to the Butokukai, is when it's believed the name of the style changed to Shitō-ryū, in honour of its main influences. Mabuni derived the name for his new style of Shitō-ryū from the on'yomi readings of the first Kanji character in their names, "Shi" for Ito("shi")su and "To" for Higashi("to")onna. With the support of Ryusho Sakagami (1915-1993), he opened a number of Shitō-ryū dojo in the Osaka area, including Kansai University and the Japan Karate-dō Kai dojo. To this day, the largest contingent of Shitō-ryū practitioners in Japan is centred in the Osaka area. However, Mabuni's contemporary Shinpan Shiroma remained in Shuri, Okinawa, and established Okinawan Shito-ryu.