|Born:||September 8, 1972, Kōtō, Tokyo, Japan|
|Years active:||1993 - present|
Tomokazu Seki (関 智一 Seki Tomokazu?) is a Japanese voice actor that affiliated to Atomic Monkey (as well as it's co-founder).
- Ultraseven Evolution - Tashiro/Voice of Alien Garut
- Ultra Zone - Voice of Alien Zarab, Kemur Man
- Ultraman Zero The Movie: Super Deciding Fight! The Belial Galactic Empire - Voice of Glen Fire
- Ultraman Zero Gaiden: Killer the Beatstar - Voice of Glen Fire
- Ultraman Retsuden - Voice of Glen Fire
- Ultra Zero Fight - Voice of Glen Fire
- Ultraman Ginga: Theater Special - voice of Alien Icarus
- Shin Ultraman Retsuden - voices of Alien Icarus, Glen Fire
- Ultraman Ginga S - voice of Alien Icarus
- Ultraman X - Voice and human form of Alien Icarus Icary
- Mobile Suit Victory Gundam - Voice of Tomache Massarik
- Mobile Fighter G Gundam - Voice of Domon Kasshu
- Mobile Suit Gundam Seed - Voice of Yzak Joule
- Nodame Cantabile - Voice of Shinichi Chiaki
- Fate/stay night - Voice of Gilgamesh
- One Piece - Voice of Rob Lucci
- Fruits Basket - Voice of Kyo Sohma
- Hajime no Ippo - Voice of Ichiro Miyata
- Rave Master - Voice of Haru Glory
- Fushigi Yuugi - Voice of Chichiri
- Cardcaptor Sakura - Voice of Toya Kinomoto
- Yo-Kai Watch - Voice of Whisper
- Psycho-Pass - Voice of Shinya Kogami
- Seki shows to develop a rivalry with Tomokazu Sugita, whom shares the same first name. Ironically, Seki is technically one of the founding member's of the talent agency Sugita affiliated to, Atomic Monkey.
- According to Seki, he himself is also a Tokusatsu fan and yet, likes his role in the 35th Super Sentai Series, Kaizoku Sentai Gokaiger, where he was given the chance to voice the series' Mobirates, feeling honoured that his voice would be enjoyed by children.
- He is always mistaken for Toshihiko Seki, a fellow voice actor whom shares the same family name.
- Tsuburaya Prods, aware of the fact that Tomokazu Seki had played Domon Kasshu in Mobile Fighter G Gundam, used Domon's God Gundam as one of the main attributes to design Glen Fire.