1.) Kirara is annoying as fuck. If she is going to stay around, AT LEAST give her SOME redeeming qualities other than not wearing pants because... "fashion". For fuck's sake, pants protect your skin slightly as well. It's nice to not have to worry about zombie maggots crawling into your scuffed up knees.
2.) Where is the JSDF? Where are the United States Forces Japan units? 200,000 dead? Jesus Christ, that's not even a problem. JSDF and USMC and other security forces could just load up in armored vehicles and sweep and clear and have a good old time piling up bodies like cord wood. Even if it was 200k that could fight back, it could still be doable. Realistically, it would be a done deal it would just take time to be thorough. And since the alive-infected just seem to die instead of turning into more carriers, it's even more optimal.