It's been like this for 3 or 4 days, not really sure when it turned out to be like this.
Basically, I can still alternate between JP and ENG keyboards (using ALT+SHIFT), but the Japanese keyboard is acting like an English keyboard (the characters I am using right now), beforehand I pressed ctrl+caps to enable the Japanese input, but now it's only enabling/disabling the caps-lock function. It's like my Japanese keyboard is a normal English keyboard, but I know it's changing between keyboards because of some keys that actually are from the Japanese one.
One more thing, I noticed the Language tab is "transparent", it used to display the keyboards before (ENG, PT, JP which are the ones I used) and when I click it, nothing happens.
My windows is updated and already tried reinstalling the Japanese keyboard, nothing worked.
The transparent Language tab: