Open the hidden emoticon keyboard on your iPhone or iPad
So far so good? Great! Next, you scroll on the screen until you see Japanese. Clicking on that will leave you with a pair of choices. Select Romaji. Now click on the globe icon on the keyboard. Following that, you click the "123" button followed by the button with the “^_^” face.
Congratulations, you have just unlocked a new set of emoticons for your use. Use them wisely!