Personally I don't like Maximum the hormon or babymetal. Babymetal pretty much because I do understand the lyrics and I prefer pop to be pop. But they are pretty big there and even serious musicians love them.
Japan + metal = they have room for everything and they get followers so they can make their music. Sometimes too unique but one thing is in common. They do it from their hearts and with 110% of energy and its something that really made me to like their scene(s) because I as a christian should have same kind of attitude.
I think this song wouldn't be done ever in Finland:
Most Japanese are not very good in English so the lyrics are very hard to understand often. You also see lot of typos in them. Many times on the official websites too have plenty of them. I have never tried to read lyrics and translate them directly into Japanese if they make then more sense but maybe they are just setting up new dimensions into English and we understand that decades afterwards what they meant. I prefer to shake my head and enjoy as much as possible.