Buy a fighter and 4 infantry. You take your guys in French-indochina Burma, the guys in kwangtang, and the fighter in manchuria and attack China. you should occupy it easy. then land them to your own satisfaction to either defend against the russians or british.
Your fleet. attack the americans at hawaii with 2 battleships, the carrier, the sub, and the fighter from JAPAN. Easy win. then with your other fighter (on your carrier) and a transport with 2 infantry from japan invade hawaii. land fighters on carrier.
take infantry in phillipines and unload them into french-indo china. also land fighter there. place infantry on all mainland territories and the other in the phillipines. place fighter on japan.
that, to my opinion, is the best Japanese stratagey for the first turn.
Waffen_AH