>They seem to be very unhappy about Japan building up its war fighting capacity.
Could be a strategy going on here.
Before they invaded Ukraine, Russia criticized Ukrainian military buildup as "destabalising". Probably with full knowledge of their own plans to invade.
Russia also criticized the ethnic cleansing of Donbass via artillery strikes on civilian areas - casualties and deaths reported daily in the LPR and DPR media, but never made a single peep in the Western news.