full Japan setup as best as I can tell
Japan: 8 infantry, 2 artillery, 1 tank, 1 aa gun, 2 bombers, 3 fighters, 4 Tac Bombers, 1 airbase, 1 naval base, 1 major ic
Caroline Islands: 1 infantry, 1 aa gun, 1 airbase, 1 naval base
Formosa: 1 fighter
Iwo Jima: 1 infantry
Jehol: 2 inf, 1 art
Kiangsi: 5 inf, 1 art
Korea: 1 inf
Kwangsi: 3 inf, 1 art
Manchuria: 4 inf, 1 mech inf, 1 art, 1 aa gun, 1 bomber, 3 fighters, 2 tac bombers
Okinawa: 1 inf, 1 fight
Palau: 1 inf
Kiangsa: 1 inf, 1 fighter, 1 tac bomber, 1 bomber
Shantung: 1 inf
Siam: 2 inf
Zone 6: 1 sub, 2 destroyers, 2 AC with a fighter and tac bomber each, 1 cruiser, 1 battleship, 2 transports
Zone 19: 1 sub, 1 destroyer, 1 cruiser
Zone 33: 1 destroyer, 1 AC with a fighter and tac bomber, 1 battleship, 1 transport
Assuming 11 ipc tac bomber, 4 ipc mech inf, 18 ipc AC
Best guess for total unit cost: 397! IPCs of units