People misunderstand Xboxs presence in Japan. While there were some sincere efforts to boost it during 360s heyday, sponsoring big acts concert tours and such, even tomthe point of putting Xbox logos on their amps, Xbox is not in Japan to sell games or systems.....in Japan.
Japan is a society which is all about keeping up appearances. Microsoft pays rent on their shelf space in major game retailers for the specific purpose of keeping up those appearances, as the Japanese brass will be much less likely to greenlight development, or make good deals on a system they cant be marched down to Yodobashi camera and shown its got a solid footing against PlayStation. Thats just the way things work there. Like so many things. You just have to shrug, say when in Romeand soldier on.