If you want to remove your account on Square Enix, a Japanse video game developper, you can easily do that in the Settings of your account.
I’ll show you below how I managed to close my profile permanently using a desktop computer:
1 Go to http://account.square-enix.com/account and login to your account
2 Select Update account information in the left menu
3 Choose Cancel Square Enix account
and click on Next when you’re ready.
4 Confirm that you accept the consequences of an account removal
5 Enter your password for security reasons
6 Last step: Hit the cancel account button
You’ll be logged out automatically and you’ll be redirected to the homepage.
Your account has now been closed.
Source (and thanks to): square-enix.com