This application allows you to type Emoji icons directly on your iPhone keyboard. You can also send emoticons to your friends in Mail, SMS, Notes and all other apps! It includes more than 460 Emoji icons.
To enable Emoji:
1) Buy and launch the app, it's called "CharMap" on your iPhone
2) Press the "More..." button 5-6 times consecutively, a message box will popup saying "You just unlocked the Emoji page..." and you will be brought to the Emoji page
3) Press the "Enable Emoji" button on the top right corner to enable Emoji keyboard
4) Quit the app and go to Settings > General > Keyboard > International Keyboards > Japanese and turn on Emoji switch.
5) Reboot your iPhone
Note: After the emoji keyboard is enabled, you can safely uninstall this app.
To use the Emoji keyboard on Mail, Messages, Notes or any other app, tap on the Globe key next to space bar to bring up the Emoji keyboard