Changes in the japanese keyboard
I want to suggest two certain changes in the japanese keyboard: The first and more important is the autocorrection bar. When you type a lot of time, sometimes the katakana will be gone, it will disappear, and you need to put katakana one by one, and it is very uncomfortable. My suggestion is to put the katakana first in the bar(and, if there is a kanji, after the kanji), because it will be easier to input it.
And the second one is only a visual change. Someone who used other apps and used a japanese keyboard surely saw a 9 buttons keyboard. Some other apps like Go Keyboard, or even the system keyboard for Windows Phone have it, and I love it, because you can put little イ without typing フィ, or something like that.
If this is the wrong place to post it, then, where I can suggest it?
I'd love the other keyboard layouts! I'm not a big fan of the 9 one, but there was another that I really liked that wasn't the romaji one... Think it was called kana mode or something. It has all the kana in neat rows and columns. IQQI's is an example and here is another picture too. I found this soooo helpful in helping me learn kana as you never want to start out with romaji.
https://talk.sonymobile.com/t5/image/serverpage/image-id/35882i2C544B105991425C/image-size/large?v=1.0&px=999
And I completely agree with the predictions problem! Most of the time I don't even get Japanese predictions. It'll change to English for some reason or a mix of kanji and English. Also, I can't delete predictions on the Japanese keyboard.