Here is Login page to manage your XMPP.JP account.
The user dashboard allows you:
You can delete your account from dashboard after loggedin.
You have reached message limit per day. This is a countermeasure against spammer, It is necessary for stable server running. Probably, you don't reach this limit with normal human conversation. But if you are very chatty, you might reached the limit. In that case you can unlock from this page.
Don't have an account?