zlaywal: I don't think it's only a problem within their gaming companies. The Japanese general entertainment industry have a very strong pro-stance for DRM. You name it, film, manga, anime etc.
The few Western companies who successfully lobbied for DRM-free japanese origin product are FAKKU and Project-H, which sold NSFW manga. Oh, I believe Jast-USA also offer DRM-free 18+ visual novel.
I can agree on this, I go to japan once every few years and I help one very specific artist/great friend with touch up work for his hentai manga for comiket. He told me they really force DRM like no tomorrow on everything due to piracy that ran in the early years of media. Anime is number one. Games is second and Hentai is slowly being enforced as well. Hentai is a very shady area right now due to it mostly being fan work of intellectual property of Anime studios, think girls und panzer series for one. Some companies allow for parody of work to be made, and don't and even care if that artists work gets pirated unless they have contracts or money is in exchange. Companies that allows wont help them at all. it's very interesting indeed.