Out of the major Japanese publishers, Konami is the one with the least market presence in North America. With Kojima leaving Konami, MSG will likely take a major hit to its popularity, and Konami doesn't have another hit franchise for the West to consume, which would make American investors anxious. Silent Hill and Castlevania are pretty popular, but they're still niche compared to MSG. It makes sense for them to de-list from the NYSE. They'll still release games in NA, since the games market is still there, but the investors' market for them is dried up in NA.
captcha: Red Queen. Captcha tells me that Capcom is the next on the list to de-list.
captcha: Red Queen. Captcha tells me that Capcom is the next on the list to de-list.