Content that violates the standards of Steam, payment providers, etc. is prohibited. Due to revisions to the guidelines, we are in the process of removing some adult games.

Content that violates the standards of Steam, payment providers, etc. is prohibited. Due to revisions to the guidelines, we are in the process of removing some adult games.
On Steam, a PC game distribution platform operated by Valve, a new tool that prohibits content that may violate the standards of payment processors, card networks, and Internet connection providers ......

The linked article is in Japanese.