I looked into JPN BA a long time ago:
http://www.youtube.com/watch?v=VVGeJ_BKm4kHere's a summary, in case you don't feel like watching the video
Ocarina - Nothing happens
Pendant of Memories - Nothing happens
Kafei's Mask - Your magic meter will refill slightly, and you will be transported to the midnight of the current day when you load a new area
Bremen Mask - This will instantly cool any Hot Spring Water caught in...the Bottle 1 slot? I think that's right. I stopped caring and researching this type of BA because it's so dumb. I just know it cools HSW in a certain legit bottle.
Deku and Zora Mask - These are the most screwed-up BA's in the game. You can't correctly summon the giants with the Oath to Order if you use either of these BA's. It's similar to (but not exactly the same as) Hookshot BA in the US version. I stopped researching this one because it was weird and frustrating, so maybe you can discover something cool with it.
I've noticed that ZSR has absolutely no information about the Japanese version on the BA page. I'll fix that with a detailed explanation soon. For now, though, I hope this answers some of your questions.