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IiRC Brigade games and/or Company B do some Japanese that might be suitable again Naval troops as well. They also do the Crossley armoured car with the twin MG.EDIT: Yes it is Company B Naval Bgdehttp://www.companyb.biz/
Unfortunately Company B website won't allow me to link to a page but itis near the end of the infantry section.Again all their troops are lumped in together no way to go straight to Japanese.