Koichi Yamadera

Koichi Yamadera (山寺宏一, Yamadera Kōichi) is a Japanese voice actor affiliated with Across Entertainment.

Roles[]

Year	Title	Role	Notes
1990	Ultraman: Towards the Future	Lloyd Wilder	Japanese dub
2015	Gridman the Hyper Agent: boys invent great hero	Takeshi Todo
	The・Ultraman: Jackal vs. Ultraman	Demon King Jackal
		Zoffy
		Melos
		Other male characters
2017	Ultraman Orb The Movie: Let Me Borrow the Power of Bonds!	Alien Gapiya Sadis^[1]
2022	Shin Ultraman	Zōffy
	Shin Ultra Fight	Narrator^[2]^[3]
	Continued Ultra Fight	Narrator^[2]^[3]

Ninja Scroll - Voice of Jūbei Kibagami
Cowboy Bebop - Voice of Spike Spiegel
Dragon Ball Z: Battle of Gods - Voice of Beerus: The God of Destruction
Ghost in the Shell - Voice of Togusa
Mashin Eiyuuden Wataru - Voice of Kurama Wataribe
Neon Genesis Evangelion - Voice of Ryoji Kaji
Anpanman - Voice of Cheese
Ranma ½ - Voice of Ryōga Hibiki
Lupin III - Voice of Koichi Zenigata (replacing the late Goro Naya)
One Piece - Voice of Donquixote Rosinante
GinTama - Voices of Yoshida Shouyou and Utsuro
Hunter x Hunter (2011 version) - Voice of Silva Zoldyck
Samurai Pizza Cats - Voice of Bad Bird
Sword Art Online - Voice of Akihiko Kayaba
Danganronpa V3: Killing Harmony - Voices of Monokuma Kubs
Mario Kart Arcade GP 2 - Voice of Color Commentator (JP)
Batman Ninja - Voice of Bruce Wayne/Batman
Super Robot Wars - Voice of Daisuke Umon/Duke Fleed (Replacing the late Kei Tomiyama)
Shrek franchise - Dub voice of Donkey
Yakuza franchise - Voice of Shun Akiyama

Koichi Yamadera's favorite Ultra Warriors are Ultraman, Ultraseven and Ultraman Ace.^[1]
Discounting Jackal vs. Ultraman, Sadis in Orb The Movie is his first role in the Ultraman Series since Lloyd Wilder in Ultraman Great. Because of this, he was excited to return to the franchise and be casted as Sadis. Although initially nervous about this role, the director encouraged ad-libs in his role.^[1]
He is known for his versatile range, as protagonists, antagonists, and even to the point of voicing as a female.
Although he did not voice Zetton in Shin Ultraman, Yamadera posted his own impression of the monster's noises on Twitter.^[5]^[6]