Here's how you do it:
1. Open Settings
2. Tap on General and then Keyboards.
3. In the Keyboards options, tap on Keyboards (it sounds confusing but that's the process).
4. Tap Add New Keyboard and then scroll down to Japanese.
5. Choose Kana.
6. You can now access the keyboard when you are writing anything on your iPhone. To do this, tap the globe icon (next to 123) on your keyboard and then tap the kana characters.
7. The last step to choose this key ^-^ which will show all the emoticons.
Source: Stuff NZ
