Earlier quoted context omitted.
As a French living in Japan one of the things I quickly learned is that if I complain about something while showing even a hint of anger or annoyingness, my interlocutor will take it personally, even if he/she is not involved about the thing as well.
Was you complaint about something related to Japan or the life there or the administration? Japanese people very easily feel compelled to defend their group, because if not they are often treated as "anti-japanese" by the most right-wing (which are the most vocal) of their relations/neighbors. This in turn leads to a lot of self-censorship.
I think you're on the wrong track; some people just take everything personally. Compare this story from an American married to an American: ( https://www.shamusyoung.com/twentysidedtale/?p=49908 )
> Early in our marriage I’d find myself in the middle of situations like this:
>> Shamus is struggling with some ridiculous multi-stage problem with Windows 98.
>> Shamus: AAAAAAARG. WHAT THE FUCK?!!??! FRRRGGGKKKKK.
>> He can’t hold it any longer. He slams his fist into the bottom-right of his keyboard and caves in the bottom of the numpad. He’s vaguely aware that he’s just injured his hand, but he can’t feel it yet because of the adrenaline rush.
>> Heather dashes into the room in a panic.
>> Heather: What’s wrong?!?!?!
>> Shamus struggles to get a grip on himself
>> Shamus: It’s… Windows. It… first it wanted the disk, and THEN it says it can’t FIND the disk even though the disk is FUCKING RIGHT THERE! I CAN SEE IT IN THE FILE EXPLORER BUT WINDOWS WON’T LET ME FUCKING ACCESS IT AND THEN–
>> Heather slams her hands over her ears and looks like she’s on the edge of tears.
>> Heather: Stop shouting at me!
> I’ve lost count of the number of times I shouted, “I’M NOT ANGRY AT YOU, I’M JUST ANGRY.”
> Once I understood some of the problem, I was able to explain it to my wife. Now she knows not to dash into the room just because I’m shouting at Uplay or whatever.