Best known for his role of Dr. Who in King Kong Escapes (1967), Eisei Amamaoto started out his acting career with the Hayuza group, and was noticed by Toho due to his unusual size and appearance. He started out his career playing several small roles in the late 50's and early 1960's. Amamaoto even managed to land a small role in Kurosawa's masterpiece Yojimbo (1961) as a henchmen. Amamaoto also played a "snake-handling gangster" in the film Key of Keys (1965), better known to westerners as the Woody Allen film What's Up, Tiger Lily?. Amamaoto eventually garnished a cult following in Japan, due to his roles in Toho movies and other Japanese television series, such as Kamen Rider. Kaneko would give Amamaoto his last role in the film Godzilla, Mothra & King Ghidorah: Giant Monsters All Out Attack (2001) as the Prophet Isayama, Amamaoto's part in the film was written especially for him. Was sometimes credited as Hideo Amamoto later in his career.

Acting Toho Filmography
Samurai Saga (1959)
Monkey Sun (1959)
The Three Treasures (1959) - Spectator of Gods' Dance
The Secret of the Telegian (1960) - Onishi's Henchman
The Gambling Samurai (1960)
Westward Desperado (1960)
Daredevil in the Castle (1961) - Interpreter
Yojimbo (1961) - Yahachi, Seibei's Henchman
The Scarlet Man (1961) - Nagaoka Sado
Gorath (1962) - Drunk
Chushingura (1962) - Takano, of the Chunagons
Matango (1963) - Humanoid Matango
Atragon (1963) - Mu Head Priest
Samurai Pirate (1963) - Granny the Witch
Warring Clans (1963)
The Elegant Life of Mr. Everyman (1963) - Yanagihara, Suntory Employee
Ghidorah, The Three-Headed Monster (1964) - Wu, Butler
Dogora (1964) - Maki, Safecracker
Oh! My Bomb! (1964)
Key of Keys (1965) - Snake-Training Gangster
Samurai Assassin (1965) - Matazaburo Hagiwara
Fort Graveyard (1965) - Shiga
Sword of Doom (1966)
The Adventure of Taklamakan (1966) - Witch
Rise Against the Sword (1966) - Heiroku
Ebirah Horror of the Deep (1966) - Red Bamboo Naval Officer
Epoch of Murder Madness (1967) - Shogo Mizorogi
King Kong Escapes (1967) - Dr. Who
Japan's Longest Day (1967) - Sasaki, Captain
The Killing Bottle (1967) - First Murderer
Good Dorifutazu! Advance Forward Matazenshin (1967)
Kill! (1968)
All Monsters Attack (1969) - Shinpei Inami, Toy Maker
Portrait of Hell (1969)
Red Lion (1969) - Gensai, Doctor
Crazy Raid on Shimizu Port (1970)
Battle of Okinawa (1971)
Lupin the 3rd: Strange Psychokinetic Strategy (1974) - Thug
The Blue Stigma (1978)
Hong Kong Paradise (1990)
My Soul Is Slashed (1991) - Ono, Caretaker
Godzilla, Mothra & King Ghidorah: Giant Monsters All Out Attack (2001) - Hirotoshi Isayama, Prophet