"The alleged security breach of the SanrioTown site is currently under investigation," Sanrio said in a statement to the site. "Information will be made available once confirmed."

This incident comes on the heels of a highly publicized hack also involving a popular, child-focused property: VTech. That incident exposed the personal data, chat logs and photos of 6.3 million people, 200,000 of whom were children. This month, police arrested a man in the UK in relation to that hack.

Update: Sanrio has confirmed the issue, and says it's been fixed. A security advisory on the company's site notes that it left the door open to over 180,000 under-18s' data. It also claims that, to the best of its knowledge, no information was actually taken.