Kōki Miyata, formerly Harunori Miyata, is one of the few voice actors who can convincingly play the cute boy or Bishōnen archetype with the point that the first type is really voiced by a male rather than the usual shtick. This is mostly because of his uber high-pitched voice. However, he can play deep-voiced males as well.
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