Nintendo has confirmed that the Japanese version of its Club Nintendo reward service has been hacked.
The hack is said to have taken place between June 9 and July 4, with the company finding 23,000 unauthorized log-ins, amounting to 15 million log-in attempts in total.
Credit card information is not stored on the service, however names, addresses, phone numbers, and email details have been compromised.
We'd imagine a big apology will be incoming from Nintendo. This doesn't seem to affect the US or European versions of the service, although some heavy maintenance may be incoming for these.