Just checked and Halo 5 charted with 7,4k copies in 2015. Can't think of anything since then that might have charted.
As far as I know the strongest sales week ever for an xbox game in Japan was Tales of Vesperia which debuted at 106k in 2008. Boosted the 360 to a whopping 25k sales that week. Incredible.
Impressive to think the 360 might have competed with the PS3 for a single week during the 7th generation ...
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