Japan was getting very Westernised. So much so, that he decided to dye his hair blonde.
Here are the other countries' reactions.
Germany: WHO DID ZIS TO YOU?! *shakes him vigorously*
Japan: You're in my personar space! Prease stop shaking me!
Italy: veee~ who's this? *points to Japan*
Germany: It's Japan, Italy. It's Japan.
America: Dude, what happened? Were you that drunk at the party last night?
Japan: Iie, I wasn't. It was my decision.
England: WHO THE BLOODY HELL IS- wait, oh it's you, Japan. What the bloody hell did you do?
France: 'o ze 'ell is zis? Oh, is Japan trying to get beautiful 'air like mine, ohohohohoho~?
Japan: No, not in a mirrion years.
China: What did you do Japan? You an ass.
Japan: I am fine. It was a personar decision.
Canada: It was his choice...
Everyone: What was that?
Canada: *sigh*
Kuma: Who are you?
Canada: I'm Canada.
Prussia: kesesesesese, VHAT happened, loser?! Trying to get awesomeness like mine?
Germany: Vhy are jou even here? Aren't jou not a nation anymore, Bruner?
Prussia: SUCK IT, LOSER!
Romano: {censored}