He actually won the first seiyuu award's 'Best Male Supporting Actors' role.
Notable roles by Kōki Miyata:
- Abhmad Saluja (Playing Against Type) in Magi: Labyrinth of Magic
- Aichiro Nitori in Free!
- Beast Boy in the Japanese dub of Teen Titans
- Chihiro Fujisaki and Alter Ego in Danganronpa: Trigger Happy Havoc
- Chōjūrō in Naruto
- Cubic Galois in Phi-Brain: Puzzle of God
- Datas (Hyper) in Tensou Sentai Goseiger
- Dique Gunhale in Mobile Suit Gundam AGE
- Dracumon in Digimon Ghost Game
- Echoes in Boogiepop and Others (2019)
- Enzo in the Japanese version of Arena of Valor
- Grounder in the Japanese dub of Adventures of Sonic the Hedgehog
- Hachi Shiou in D-Frag!
- Hanataro Yamada in Bleach
- Houchou Toushirou (sweets and wifely women!) in Touken Ranbu
- Isami Fujiwara in Noein
- Kouta "Muttsulini" Tsuchiya in Baka and Test: Summon the Beasts.
- Kunihiko Moji in Bokurano.
- Labrador in 07-Ghost
- Masao Amae in Laughing Salesman NEW
- Masato Iwai in Super Gals
- Michael Levi and Gabriel Levi in Shingakkou -Noli me tangere- (Credited as Naoki Toujou)
- Mitsuki Kamatani in MEGANEBU!
- Murata in Demon Slayer: Kimetsu no Yaiba
- Olifio in Star★Twinkle Pretty Cure
- Peter White in Alice in the Country of Hearts
- Phineas in the Japanese dub of Phineas and Ferb
- Phog in Xenoblade Chronicles X
- PicoDevimon in Digimon Adventure
- Ranma Atsuta (a.k.a. Mori Ranmaru) in Nobunaga-sensei no Osanazuma
- Rei in Angel Tales
- Rhythm in Shugo Chara!
- Riju in Kirepapa
- Samon Kanzaki in Nintama Rantarou
- Shimon Nagareyama in Harukanaru Toki no Naka de
- Shredded Chicken with Golden Bamboo Shoots in the Japanese dub of The Tale of Food
- Shujaku no Rei in Saint Beast
- Sorara in Onegai My Melody: Kirara
- Susumu "Hakase" Tsukumo in Wandaba Style
- Terufumi Sugimoto in Yowamushi Pedal
- Tinpla in 100 Sleeping Princes and the Kingdom of Dreams
- Berry in Onegai My Melody alongside the character's current voice in Japan
- Tomoe Tatsumi in The Tyrant Falls in Love
- Torahamu-kun (Stan) in Hamtaro
- Travis in the Japanese dub of Bob the Builder
- Tricera in Bakuryuu Sentai Abaranger
- Ukyo in Amnesia: Memories
- Wadatsumi and Dellinger in One Piece
- Winner Sinclair in Karin
- Yukito Tsukishiro in Tsubasa -RESERVoir CHRoNiCLE-
- Yuzu in the drama CD of Hybrid Child (replaced by Tsubasa Yonaga in the anime)
- Zombie Devil in Chainsaw Man
- Zushiōmaru Sumida in Doreiku
