Isn't Japan like the third or fourth largest BO?
Yes, third next to China, as a matter of fact.
Frozen was huge in Japan because of the VA and how wonderfully translated the songs were right?
Not sure of the obvious reasons, but I'd say the Japanese dubbers did a wonderful job and Takako Matsu successfully made "Let it go" a huge hit in Japan. tbh, I love Matsu's singing voice a lot more than Menzel's.
I didn't realise that animated movie was no.1 (and no.5)! Is it really good?
Don't forget #3 is also animation

t: Spirited Away deserves its BO number with its ground-breaking story/universe and the mythical creatures. Everything happens is unexpected and the story is hard to predict. As much as I love TFA, I don't think its worthy enough to steal Spirited Away's #1 all-time BO spot in Japan. And Spirited Away isn't even my favorite GHIBLI film... because it's dark and grotesque, but I admit the quality is amazing.
I can't say the same about Howl's Moving Castle though. Howl was good, I like it, but not that great, actually. I think it has massive opening number because Miyazaki announced his retirement before the release and said Howl would be his last work. But then the old fart changed his mind and decided he hadn't made enough movies so he made two more before he finally retired two years ago.
But anyway I really recommend GHIBLI movies.
Marvel movies rather surprisingly don't fare well in Japan, but Star Wars is a staple of their pop culture.
Star Wars is something nostalgic for the Japanese as much as it is for the Americans, I believe. Didn't Mark Hamill promote ANH in Japan in 1978? I think I saw pictures of that. The OT was big in Japan, indeed. I saw a Japanese interview in youtube, with Mark, Carrie and Gary Kurtz too, too bad it was dubbed though, I wanted to hear their real voices.
Star Wars contains a lot of eastern elements that appeals to asians, Marvel stuff has none.
1. Master and pupil's relationship
2. A warrior's soul-searching
3. A warrior's code of honor
4. Swordplay
5. Masked villain
6. Family drama
and the list goes on...