A common pattern I've seen with Japanese websites hosting... that sort of content. In this case they are just catching up to their main site dmm.co.jp which first blocked outside access a year or two ago, then blocked all access from non-account holders entirely. The non-adult site dmm.com is still available. Coincidentally I'm playing Yakuza 4 right now and it has a few billboard ads for dmm.com.
A common pattern I've seen with Japanese websites hosting... that sort of content. In this case they are just catching up to their main site dmm.co.jp which first blocked outside access a year or two ago, then blocked all access from non-account holders entirely. The non-adult site dmm.com is still available. Coincidentally I'm playing Yakuza 4 right now and it has a few billboard ads for dmm.com.