- Mega Man X6 (2001/2002) -- Special Thanks (as Koujirou Ogiwara)
- Breath of Fire: Dragon Quarter (2002) -- Object Designer (as Kohjiroh Ogiwara)
- Mega Man X7 (2003) -- Object Designer
- Mega Man X8 (2004/2005) -- Object Designer
- Phoenix Wright: Ace Attorney (DS Version) (2005) -- Art (Case 5 Credits) (as Koujirou Ogiwara)
- Mega Man Maverick Hunter X (2005) -- Character Designer
- Mega Man Powered Up (2006) -- Character Designer
- Apollo Justice: Ace Attorney (2007) -- Design / Art
- Monster Hunter Freedom Unite (2008) -- Character CG Artwork (Monster Hunter Freedom Unite Staff)
- Monster Hunter 3 (2009) -- Character CG Artworks
- Monster Hunter 3 Ultimate (2011) -- Character CG Artwork
- Monster Hunter 4 (2013) -- Character CG Artwork (as Kojiro Ogiwara)
- Ogiwara was also the Japanese voice of Housuke Odoroki (Apollo Justice) in Apollo Justice: Ace Attorney.
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