Behind the camera
- 2025Digimon BeatbreakScreenplay, Series Composition49 ep.
- 2023Metal CardbotSeries Composition78 ep.
- 2020Catch! TeeniepingWriter130 ep.
- 2019Gorgeous Butterfly: Young NobunagaWriter12 ep.
- 2013Glitter Force Doki DokiSeries Composition, Writer49 ep.
- 2012Sengoku Basara - Moonlight PartyScreenplay9 ep.
- 2006Project Blue Earth SOSWriter6 ep.
- 2006Digimon Data SquadSeries Composition, Writer48 ep.
- 2004Diamond DaydreamsSeries Composition13 ep.
- 2002KanonSeries Composition, Writer13 ep.
- 2000Ghost StoriesWriter4 ep.
- 2000Mirai Sentai TimerangerWriter8 ep.
- 1999Hunter x HunterWriter9 ep.
- 1999MedabotsSeries Composition, Writer52 ep.
- 1999Great Teacher OnizukaWriter9 ep.
- 1999I'm Gonna Be An Angel!Screenplay26 ep.
- 1999Kyuukyuu Sentai GoGoFiveWriter8 ep.
- 1998Nightwalker: The Midnight DetectiveWriter1 ep.
- 1998Cowboy BebopWriter1 ep.
- 1997Cutie Honey FlashSeries Composition, Writer39 ep.
- 1996The Vision of EscaflowneWriter26 ep.
- 1995ZenkiWriter5 ep.
- 1992Sailor MoonWriter1 ep.
Also known as: Ryouta Yamaguchi · Ryōta Yamaguchi · やまぐち りょうた