RPG:
Story: Konami (Suikoden)
Character Design: Level-5 (Rogue Galaxy)
Creature Design: Atlus (Nocturne, DDS/2, Persona 3/4 etc)
Battle System: Konami (Suikoden)
World Design: Square-Enix
Open World Action/Adventure Aspect: Ubisoft (Beyond Good and Evil)
Music: The Pillows (Do yourself a Favor and look them up, the Japanese version of course :)