International Gojuryu Karatedo Seigokan Federation - IGKSF 國際剛柔流空手道正剛館連盟 was recognised by Kancho Seigo Tada III in 2003 and is in the process of formalising the formation.
International Gojuryu Karatedo Seigokan Federation (IGKSF) - 國際剛柔流空手道正剛館連盟 - is open to all current and past Seigokan members worldwide. Non-members are welcome to join too.
