is a Japanese voice actor and singer. He previously worked with Haikyō. He is honorary president of and affiliated with Atomic Monkey and the chairman of theater company HeroHero Q. He is a special lecturer at Japan Newart College.
Career Seki landed his first role in the 1993 anime Mobile Suit Victory Gundam as Tomache Massarik. Some of his most notable roles include Shinichi Chiaki from Nodame Cantabile, Gilgamesh from the Fate franchise, Rob Lucci from One Piece, Gundam characters Domon Kasshu and Yzak Joule (from Mobile Fighter G Gundam, Mobile Suit Gundam SEED, and Mobile Suit Gundam SEED Destiny, respectively), Kyo Sohma from Fruits Basket, Whisper from Yo-kai Watch, Kanji Tatsumi from Persona 4, Shinya Kogami from Psycho-Pass, Ichiro Miyata from Hajime no Ippo, Haru Glory from Rave Master, Toya Kinomoto (Sakura Kinomoto's older brother) from Cardcaptor Sakura, Van Fanel from The Vision of Escaflowne, Suneo Honekawa in Doraemon, Enrico Pucci from JoJo's Bizarre Adventure, Chichiri from Fushigi Yuugi, and Ken Hidaka from Weiss Kreuz, alongside Hiro Yūki, Takehito Koyasu, and Shin-ichiro Miki. Koyasu and Miki, along with Seki, also had voice roles in Initial D as Keisuke Takahashi, Gravitation, and Nobuo Terashima in Nana. Seki has also voiced Ryūki Shi in Saiunkoku Monogatari, recurring guest character Meito Anizawa in Lucky Star, and Shōji Tōkairin in You're Under Arrest and related media, along with Sakiko Tamagawa, Akiko Hiramatsu, and Yoshiko Sakakibara.
On November 20, 2017, Seki apologized on the online radio program Unizon for an incident which had taken place a day earlier, during an event for the online radio program A&G All Star 2017, where he had instructed Yusuke Tonozaki, a newbie voice actor from his agency, to ask voice actress Rina Hidaka to have sex with him (one of them both) as a joke.
Filmography
Television animation Year Title Role Notes 1993 Mobile Suit Victory Gundam Tomache Massarik, Chris Royd 1994 Aoki Densetsu Shoot Keigo Mahori Mobile Fighter G Gundam Domon Kasshu Captain Tsubasa J Ken Wakashimazu, Carlos Santana Tottemo! Luckyman Tensaiman 1995 Neon Genesis Evangelion Tōji Suzuhara Mobile Suit Gundam Wing Maser (episodes 13–16), OZ Soldier (episode 11), Communications man (episode 2), Auda, Reporter B Wedding Peach Igneous Fushigi Yugi Chichiri, Koji 1996 The Vision of Escaflowne Van Fanel Those Who Hunt Elves Junpei Martian Successor Nadesico Tsukumo Shiratori, Gai Daigoji 1997 Maze:The Mega-burst Space Akira Ikagura/Maze (male) Ninpen Manmaru Tsunejiro Flame of Recca Tsukishiro You're Under Arrest Shoji Tokairin 1998 Cardcaptor Sakura Toya Kinomoto Cyber Team in Akihabara Takashi Ryugasaki Weiß Kreuz Ken Hidaka Initial D Keisuke Takahashi Ojarumaru Gera 1999 One Piece Rob Lucci, Hattori Oruchuban Ebichu Kaishonachi Great Teacher Onizuka Kunio Murai Infinite Ryvius Ikumi Oze Pocket Monsters: Episode Orange Archipelago Kenji (Tracey Sketchit) Pocket Monsters: Episode Gold & Silver 2000 Ceres, Celestial Legend Alexander O. Howell Gate Keepers Reiji Kageyama Vandread Bart Garsus Gravitation Shuichi Shindo Hajime no Ippo Ichiro Miyata 2001 Fruits Basket Kyo Sohma (cat zodiac) Captain Tsubasa: Road to 2002 Tsubasa Ohzora (adult) Samurai Girl: Real Bout High School Shizuma Kusanagi Star Ocean EX Ashton Anchors Angelic Layer Masaharu Ogata Groove Adventure Rave Haru Glory 2002 Full Metal Panic! Sousuke Sagara Naruto Sagi Mobile Suit Gundam SEED Yzak Joule Samurai Deeper Kyo Shinrei Mirage of Blaze Mori Ranmaru Azumanga Daioh: The Animation Chiyo's Father Tokyo Underground Rumina Asagi Chobits Hiromu Shinbo Kanon Jun Kitagawa GetBackers Miroku Natsuhiko Mirage of Blaze Satoshi Hatayama Monkey Typhoon Sanzo 2003 Bobobo-bo Bo-bobo Giga Ayu Mayu Gekijou Kouda Kouji Last Exile Ethan Konjiki no Gash Bell!! Aleshie Gungrave Brandon "Beyond the Grave" Heat Gad Guard Seikai Full Metal Panic? Fumoffu Sousuke Sagara Pocket Monsters Side Stories Kenji (Tracey Sketchit) Pocket Monsters: Advanced Generation 2004 Monster Karl Neumann Ninja Nonsense Sasuke Mobile Suit Gundam SEED Destiny Yzak Joule Black Jack Black Jack (teenager) Area 88 Mickey Simon Tetsujin 28-go Detective Seki Zoids: Fuzors Alpha Richter Meine Liebe Eduard My-HiME Yuuichi Tate Bleach Shinobu Eishima, Masayoshi Futari wa Pretty Cure Mepple Harukanaru Toki no Naka de ~Hachiyou Shou~ October 5, 2004 Tenma Morimura Tenjho Tenge Masataka Takayanagi Genshiken Soichiro Tanaka Mars Daybreak Gram River Gankutsuou: The Count of Monte Cristo Marquis Andreaa Cavalcanti 2005 Doraemon Suneo Yakitate! Japan Pierrot Bolnezeu MÄR Magical Roe Full Metal Panic! The Second Raid Sousuke Sagara Angel Heart Shougo Shimazu Futakoi Alternative Rentaro Futaba Viewtiful Joe Joe Futakoi Alternative Rentaro Futaba 2006 Fate/stay night Gilgamesh Kanon Jun Kitagawa Kenichi: The Mightiest Disciple Kenichi Shirahama Buso Renkin Moon Face, Hiwatari Sekima Coyote Ragtime Show Katana Digimon Savers Neon Episode 8 NANA Nobuo Terashima Saiunkoku Monogatari Ryuki Shi 2007 Nodame Cantabile Shinichi Chiaki Lucky Star Meito Anizawa Mononoke Genyousai Yanagi Devil May Cry: The Animated Series Vincent Episode 2 Wangan Midnight Deceased Devil Z Owner Kishin Taisen Gigantic Formula Wen-Yee Li"Apo Mekhanes Theos Gigantic Formula".(April 2007) Newtype USA. p. 11. 2008 Nodame Cantabile: Paris-Hen Shinichi Chiaki Rosario + Vampire Ginei Morioka Rosario + Vampire Capu2 Casshern Sins Jin Persona: Trinity Soul Toru Inui Kimi ga Aruji de Shitsuji ga Ore de Ren Uesugi Himitsu – Top Secret Tsuyoshi Maki Telepathy Shojo Ran Jiken Note Isozaki Rin 2009 Fairy Tail Lucky The Tower of Druaga Dark Gilgamesh Soten Koro Liu Bei 2010 Giant Killing Takeshi Tatsumi Nodame Cantabile: Finale Shinichi Chiaki Sengoku Basara II Mitsunari Ishida Angel Beats! Igarashi Episode 8 Arakawa Under the Bridge x Bridge Captain Koihime Muso Fake Ryubi Sengoku Basara II Mitsunari Ishida 2011 Beelzebub Hidetora Tōjō Fate/Zero Gilgamesh Persona 4: The Animation Kanji Tatsumi Sket Dance Sojiro Agata Future Diary Marco Ikusaba Steins;Gate Hashida Itaru 2012 Hakuouki Reimeiroku Ryūnosuke Ibuki Psycho-Pass Shinya Kogami Sword Art Online Kibao Saint Seiya Omega Virgo Fudo Fate/Zero Archer/Gilgamesh Cho Soku Henkei Gyrozetter Mic-Man Seki 2014 Fate/stay night: Unlimited Blade Works Gilgamesh Kamigami no Asobi Melissa Persona 4: The Golden Animation Kanji Tatsumi Yowamushi Pedal Eikichi Machiyama Strange+ Ko Yōkai Watch Whisper 2015 Fate/stay night [Unlimited Blade Works] 2nd Season Gilgamesh Fate/kaleid liner Prisma Illya 2wei Herz! Black Servant/Gilgamesh Episode 6-8 One Punch Man Stinger Gangsta Striker Garo: The Animation Michael Chaos Dragon Qisha Tianling Saint Seiya: Soul of Gold Rize Andreas Garo: Crimson Moon Ashiya Douman 2016 Grimgar of Fantasy and Ash Renji Nanbaka Hajime Sugoroku Ashura: Dark Phoenix Ashura (Teenager) Shōwa Genroku Rakugo Shinjū Yotarō Joker Game Sakuma, Yoru Sweetness and Lightning Yūsuke Yagi Nobunaga no Shinobi Mori Yoshinari, Imagawa Yoshimoto 2017 Gin Tama Pluto Batou Infini-T Force Ken Washio / Gatchaman My Hero Academia season 2 Selkie Clean Freak! Aoyama-kun Kaoru Zaizen Garo: Vanishing Line Sword 2018 Cardcaptor Sakura: Clear Card Toya Kinomoto Full Metal Panic! Invisible Victory Sousuke Sagara Gakuen Basara Ishida Mitsunari Steins;Gate 0 Hashida Itaru Zoids Wild Gallagar 2019 Demon Lord, Retry! Isami Tahara Fire Force Rekka Hoshimiya Demon Slayer: Kimetsu no Yaiba Sanemi Shinazugawa Fate/Grand Order - Absolute Demonic Front: Babylonia Gilgamesh, Wolfgang Amadeus Mozart (episode 4) Blade of the Immortal -Immortal- Sōri Psycho-Pass 3 Shinya Kogami 2020 Drifting Dragons Crocco Somali and the Forest Spirit Kokilira Great Pretender Ishigami The God of High School Announcer T / Shim Bongsa Jujutsu Kaisen Panda Dragon Quest: The Adventure of Dai Hadlar 2021 Back Arrow Sola Athin Yo-kai Watch Jam – Yo-kai Academy Y: Close Encounters of the N KindHaruhiko Usumizawa Record of Ragnarok Lü Bu My Hero Academia season 5 Selkie Girlfriend, Girlfriend Milika's Father 2022 The Prince of Tennis II: U-17 World Cup Zeus Iliopoulos, Thalatta Heracles, Papadopoulos Evangelos, Vulcan Lartius, Hermes Kounellis, Orion Stephanopoulos, Apollon Stephanopoulos Golden Kamuy 4th Season Fusatarō Ōsawa 2023 High Card Ban Klondike MF Ghost Keisuke Takahashi Jujutsu Kaisen season 2 Panda Berserk of Gluttony Greed 2024 Blue Exorcist: Shimane Illuminati Saga Lewin Light Grendizer U Zurill Kinnikuman: Perfect Origin Arc Ramenman, Kinkotsuman Wistoria: Wand and Sword Workner Norgram Dandadan Dover Demon Neko ni Tensei Shita Oji-san President Ranma ½ Ichiro Beastars Final Season Deshico Dragon Ball Daima Majin Kuu 2025 Clevatess Rodd Fate/strange Fake Archer Gnosia Shigemichi 2026 High School! Kimengumi Rei Ichidō Jujutsu Kaisen season 3 Panda Akane-banashi Chocho Konjakutei 2027 Kagurabachi Kunishige Rokuhira
Original net animation (ONA) Year Title Role 2021–2022 JoJo's Bizarre Adventure: Stone Ocean Enrico Pucci 2023 Ōoku: The Inner Chambers Mizuno Yūnoshin 2025 Bullet/Bullet Qu-0213 Naka-ani
Original video animation (OVA) Year Title Role 1993 Giant Robo Genya/Emanuell, Koshin 1994 You're Under Arrest Shoji Tokarin Kizuna: Bonds of Love Toshi Natsuki Crisis Keiji 1995 New Cutey Honey Akira Fudo 1996 FAKE Dee Laytner Fushigi Yugi Chichiri, Koji Battle Arena Toshinden Eiji Shinjo Maze Maze (male) Psychic Force Burn Griffith 1997 Eight Clouds Rising Kuraki Fuzuchi; Manashi 1998 Getter Robo: Armageddon Go 1999 High School Aurabuster Kiba Gravitation Shuichi Shindo Rurouni Kenshin: Tsuiokuhen Katsura Kogoro 2000 Amon: Apocalypse of Devilman Ryo Asuka, Satan 2001 Fushigi Yugi Eikoden Chichiri Gundam Evolve Domon Kasshu (Evolve 3) Vandread Integral Bart Garsus Kikaider Kikaider/Jiro Kizuna: Much Ado About Nothing Toshi 2002 Vandread Turbulence Bart Garsus Anime Tencho Meito Anizawa Gate Keepers 21 Reiji Kageyama You're Under Arrest: No Mercy! Shoji Tokarin Initial D:Battle Stage Keisuke Takahashi Harukanaru Toji no Naka de ~Ajisai Yumigatari~ Tenma Morimura 2003 Hitsuji no Uta Kazuna Takashiro Harukanaru Toki no Naka de 2 ~Shiroki Ryu no Miko~ Taira no Katsuzane 2004 Akane Matrix Joji Goda Mirage of Blaze: Rebels of the River Edge Satoshi Hatayama 2005 Mobile Suit Gundam Seed Destiny Final Plus: The Chosen Future Yzak Joule Harukanaru Toki no Naka de ~Hachiyou Sho~ Tenma Morimura 2006 Genshiken Soichiro Tanaka Mobile Suit Gundam Seed Destiny Special Edition Yzak Joule 2007 Initial D: Battle Stage 2 Keisuke Takahashi Harukanaru Toki no Naka de 3 ~Kurenai no Tsuki~ Minamoto no "Kurou" Yoshitsune 2010 Harukanaru Toki no Naka de 3: ~Owari Naki Unmei~ 2011 Air Gear: Kuro no Hane to Nemuri no Mori Spitfire 2012 Kenichi: The Mightiest Disciple Kenichi Shirahama 2013 Assassination Classroom Koro-Sensei
Theatrical animation