TSKA Trip to Japan 2017 Club Events / By Bill Gorthy During the TSKA Club trip to Japan, we visited the JKA Headquarters. Bill Sensei with Shina Sensei. Bill Sensei with Higaonna Sensei at the JKA Dojo. TSKA members training at Shinjuko Castle. TSKA members in Japan. Kaikan Okinawa Downtown Tokyo.