asks for sega id upon opening on steam?

I was playing the game normally last night and I started the game this morning and it asks me for a SEGA ID, but obviously I'm playing the steam version and not the JP version and never have, so I don't have a SEGA ID to login with. Any help would be appreciated.

Sounds like it just accidentally redirected your connection to the Japanese servers. Have you tried clearing your DNS, verifying the "integrity of the game files," and restarting your computer?