Seki Tomokazu roles (anime)
Tomokazu has done the following roles in anime.
| 2X2 Shinobuden | sasuke |
| Air Master [2003] | Tokita Shinnosuke |
| Akihabara Dennou Gumi [1998] | Ryuugasaki Takashi (Black Prince) |
| Amon: Apocalypse of Devilman | Satan |
| Angel Beats [2010] | Igarashi |
| Angel Links | Deis |
| Angelic Layer [2001] | Ogata Masaharu |
| Ayashi no Ceres [2000] | Alexander Howell |
| Captain Herlock: Outside Legend-The Endless Odyssey | Daiba Tadashi |
| Captain Tsubasa: Road To 2002 [2001-2002] | Oozora Tsubasa (adult) |
| Card Captor Sakura | Kinomoto Touya |
| Chibits | Shinbo |
| Chikyuu Shoujo Arujuna [2001] | Oshima Tokio |
| Chobits [2002] | Shinbo |
| Coyote Ragtime Show | Katana |
| Days [2016] | Indou Kaoru |
| Detatoko Princess [1997] | Kohaku |
| Doraemon {2005.04-} | Suneo |
| Doraemon {2112nen Doraemon Tanjou} | announcer |
| Elf wo Karu Mono Tachi | Junpei |
| Evangelion | Suzuhara Touji |
| Evangelion | Seele |
| Fake | Dee Laytner |
| Fate/Stay Night [2006] | Gilgamesh |
| Fruits Basket [2001] | Souma Kyo |
| Full Metal Panic! [2001] | Sagara Sousuke |
| Fushigi Yuugi | Chichiri |
| Fushigi Yuugi | Kouji |
| Futari ha Pre Cure | Mepple |
| G Gundam | Domon Casshe |
| GadGuard | Seikai |
| Gankutsuou | Cavalcanti |
| Gatekeepers [2000] | Kageyama Reiji |
| Geisters | Dean Honos |
| Genshiken | Tanaka Souichirou |
| Ginga he Kickoff! [2012] | Ohta Ken |
| Gravitation [2000-2001] | Shindou Shuuichi |
| Groove Adventure Rave | Haru |
| GTO [1999-2000] | Murai Kunio |
| Gundam Wing {Episode 1} | reporter B |
| Gundam Wing {Episode 2} | communications man |
| Gundam Wing {Episode 11} | OZ soldier |
| Gungrave [2003] | Brandon Heat/Beyond the Grave |
| Hajime no Ippo | Miyata Ichirou |
| Harukanaru toki no naka de -Hachiyoushou- [2004] | Morimura Tenma |
| Himikoden [1999] | Kutani Masahiko |
| Hitsuji no Uta | Takashiro Kazuna |
| Initial D | Takahashi Keisuke |
| Kami Nomizo Shiru Sekai 2 [2011] {episode 3} | baseball pitcher |
| Kanon [2002] | Kitagawa Jun |
| Kanon [2006] | Kitagawa Jun |
| Kenran Butou Sai: Mars Daybreak | Gram |
| Keppeki Danshi Aoyama-kun [2017] | Zaizen Kaoru |
| Kidou Senkan Nadesico [1996-1997] | Daikouji Guy |
| Kidou Senkan Nadesico [1996-1997] | Traffic Officer |
| Kidou Senkan Nadesico [1996-1997] | Shiratori Tsukurou |
| Kidou Senkan Nadesico [1996-1997] {Episode 13} | soldier |
| Kidou Senkan Nadesico [1996-1997] {Episode 18} | father |
| Kidou Senshi Gundam Seed [2002] | Yzak Jule |
| Kidou Tenshi Angelic Layer [2001] | Ogata Masaharu |
| Kishin Taisen Gigantic Formula [2007] | Wen Yee Li |
| Kizuna 1 | Toshi |
| Kizuna 2 | Toshi |
| Koihime Musou [2008] | Ryuubi |
| Kyoukara Oreha! | Igarashi (younger brother) |
| Kyoukara Oreha! | student |
| Last Exile | Iisan |
| Magic Knight Rayearth {Episode 11} | villager 2 |
| Maze Bakunetsu Jikuu | otoko Maze (Ikaruga Akira) |
| Mirage of Blaze | Hatayama Satoshi/Mori Ranmaru |
| Monster [2004-2005] | Karl Neumann |
| Mugen no Ryvius (Infinite Ryvius) | Ose Ikumi |
| Nanako Kaitai Shinsho | Saint |
| Nichijou [2011] {episode 8} | narrator |
| Oruchuban Ebichu | Kaishounachi |
| Persona 4 [2011-2012] | Tatsumi Kanji |
| Persona 4 The Golden [2014] | Tatsumi Kanji |
| Pocket Monsters | Kenji |
| Pocket Monsters Maboroshi no Pokemon Lugia Bakutan [1999] | Kenji |
| Psychic Force | Burn |
| Rosario to Vampire | Morioka Gin'ei |
| Saint Seiya Omega [2012-2013] | Fudou |
| Saiunkoku Monogatari | ? |
| Samurai Deeper Kyo | Chouren |
| Samurai Flamenco [2013] | Harakiri Sunshine |
| Samurai Girl Real Bout High School [2001] | Kusanagi Shizuma |
| Seiseki Densetsu -Legend of the Sacred Stone- | Seiyou |
| Shadow Skill | Len Fuuma |
| Shin Kaitei Gunkan | Arisaka Gou |
| Shin Koihime Musou [2009] | Ryuubi (fake) |
| Shouwa Genroku Rakugo Shinjuu Sukeroku Futatabihen [2017] | Yotarou |
| Somali to Mori no Kamisama [2020] | Kokilira |
| Star Ocean EX | Ashton Anchors |
| Steins Gate [2011] | Hashida Itaru |
| Stratos Four | Fujitani Kei |
| Sword Art Online [2012] | Kibao |
| Taiho Shichauzo | Toukarin Shouji |
| Tenjou Tenge [2004] | Takayanagi Masataka |
| Tenkuu no Escaflowne | Van Fanel |
| Tokyo Underground [2002] | Asagi Rumina |
| Toushinden | Eiji |
| Umi ga Kikoeru | minarai |
| V Gundam | Tomarshe Masarik |
| Vandread | Bart Garsus |
| Wedding Peach | Igunis |
| Weiss kreuz | Hidaka Ken |
| X (movie) [1996] | Shirou Kamui |
| Yakumo Tatsu | Kuraki |