When Sega Genesis games arrive on Nintendo Switch Online next month, Switch owners in most regions will have to play them with three-button Genesis controllers.

Nintendo is producing a six-button version of the Genesis controller — but it will be available exclusively in Japan, Nintendo confirmed to Polygon on Friday.

Nintendo announced the controller Thursday as part of an upcoming expansion to the Nintendo Switch Online service that will bring a handful of Genesis and Nintendo 64 games to the Switch for an additional cost on top of the existing subscription.

(Of course, retro games on Nintendo Switch Online work just fine with Switch Joy-Cons or the Pro Controller.).