returned to base in Takao with A6M3 and A6M5, to convert to interceptors with A6M5c. Toko – Mixed unit with H6K4 "Mavis", E13A1 "Jake", and A6M2; later converted to interceptor with A6M5c. Tokushima – Operative trainer unit with bases in Tokushima, Shikoku, and Okinawa, equipped with A6M2, A6M2-K, and A6M5. Tsukuba – Operative trainer unit with bases in Tsukuba, Ibaraki, and Honshū with A6M2 and A6M2-K. In 1945, the group was equipped with A6M5c as part of metropolitan defence. Yabate – Operative trainer unit with bases in Yabate, Honshū, and metropolitan area; later, was in process of converting to interceptors with A6M6c. Yokosuka – Naval Air Technical Institute, Flight Test Department, and Naval administrative service; this unit was known for its principal base. They operated also from Kanagawa and Honshū; Hiroyoshi Nishizawa acted as an instructor in the detachment from December 1942 to January 1943. The unit was converted to interceptors equipped with A6M5c, A6M6c, J2M5, and N1K2-Ja in 1944–45. Mihoro – Mixed unit equipped with G3M and G4M bombers along with A6M2. They operated from Mihoro, Okinawa, Hainan, and French Indochina, and participated in seeking and sinking of British vessels HMS Prince of Wales and HMS Repulse. Iwakuni – Combat unit which participated in metropolitan defence; equipped with A6M5c. Naruo – Combat unit which acted in defence of Japan with A6M5c. Kokubu – Interceptor unit equipped with A6M5c. Kagoshima – Combat unit equipped with A6M5c. Atsugi – One of the most important bases, its unit participated in actions overseas, returning as interceptors with A6M5c and A6M6c. Kanoya – Another mixed unit equipped with G3M bombers, G4M bombers, and A6M2 fighters. They participated in kamikaze operations with G4M bombers equipped with Ohka glider bombs, and as interceptors equipped with A6M5c. Usa – Fighter air unit equipped with A6M based in Usa, Ōita. This unit provided some fighters that participated in the Pearl Harbor Attack. Kasumigaura – Operative trainer unit equipped with A6M3 and A6M5. Later converted to interceptors with A6M5c. Yokohama – Combat unit equipped with A6M2, along A6M2-N "Rufe" hydro fighters; later operated with A6M5c as interceptors in mainland Japan. Aomori – A combat unit which returned to Japanese skies as interceptors with A6M5c and A6M6c. Hyakuri – Operative trainer unit, later converted to interceptors with A6M5c. Tsuikui – Operative trainer unit, later in process of conversion to interceptor with A6M6c. Otsu – Combat unit with A6M2, A6M2-N "Rufe",