This is actually pretty easy to figure out by stumbling about in the iPhone Settings, but from time to time I hear people asking. So, here is how to turn on the Japanese keyboard and voice commands on the iPhone or iPod Touch.
1) First tap the Settings icon probably on your first screen:
2) Next tap “General.”
3) Next tap “International”–You could do the same thing by tapping “Keyboard” and then “International Keyboards,” but International gives you other options.
4) The “Language” setting sets the language for all menu titles; Try changing the Voice Control to Japanese and then hold down the home button for a few seconds. But for today’s post, we want the third choice–Keyboards.
5) Set QWERTY to ON and leave Kana off. Using QWERTY (or romaji input) is so much easier than searching for kana.
That’s it. Most people will find this on their own (I did). But for those who Google before trying, here you go!