It has been quietly going on since the 80's though as older ships and planes are replaced the replacements are just so much more capable. Much like everyone else's. The US has been urging the Japanese to step up and share more of the burden which has prompted debates about what Japan should do.
I think Japan has a cultural blind spot about the war. Stuff happened some of it bad and then we got nuked seems to be their narrative.
Kind of like how Italians look on Mussolini