Keiko Yamamoto (山本 圭子, Yamamoto Keiko, August 7, 1940 – April 18, 2024) was a Japanese voice actress from Osaka Prefecture. Many of her roles have been older women, young boys, or tomboyish young girls.

• Big X (1964) – Hans
• Osomatsu-kun (1966) – Choromatsu, Karamatsu^[1]
• Himitsu no Akko-chan (1969) – Chikako
• Sazae-san (1969) – Hanako Hanazawa
• Andersen Stories (1971) - Young Ib
• Lupin the 3rd Part I (1971) – Shukjo^[2]
• Devilman (1972) – Tare-chan
• Doraemon (1973) – Sewashi Nobi, Young Nobisuke Nobi
• Doraemon (1979) – Toraemon, Motoyama, Tsugeguchi
• Lupin the 3rd Part III (1984) – Queen Gretchen
• Dragon Ball (1986) – Grandma Hakkake
• Soreike! Anpanman (1988) – Kujira no Kutan, Bakeru-kun
• Dragon Ball Z (1989) – East Kaiou
• Chibi Maruko-chan (1990) – Mrs. Hamazaki, Mrs. Ōishi, Shōta Yamada
• Chibi Maruko-chan (1995) – Hamaji's Mother, Ms. Ōishi (1st voice), Shōta Yamada
• Dr. Slump (1997) – Akiko-san, Unchi-kun
• One Piece (1999) – Amazon
• Tottoko Hamutaro (2000) – Devihamukun/Spat
• Kirby of the Stars (2001) – Escargon's Mother
• Zatch Bell! (2005) – Riou
• Demashita! Powerpuff Girls Z (2006) – Little Arturo
• Nichijou (2011) - Yuuko's mother

Unknown date

• Akado Suzunosuke (????) – Akadō Suzunosuke
• Aria the Natural (????) – Oba-san
• Attack No.1 (????) – Kaori Yagisawa
• Bikkuriman (????) – Jack
• Eagle Sam (????) - Eagle Sam
• Galaxy Express 999 (????) – Boy (Ep. 30)
• Ganbare Gonbe (????) – Gonbe
• GeGeGe no Kitarou (????) – Shisa, Sunakake Babaa Donpei, Obebe, girl
• Kindaichi Case Files (????) – Yurie
• Kinnikuman (????) – Nachiguron, Kinkotsu-Obaba
• Kiteretsu Daihyakka (????) – Yone (first voice)
• Little Pollon (????) – Eros
• Mahoujin Guru Guru (????) – Magical Obaba
• Majokko Meg-chan (????) – Rabi Kanzaki
• Moretsu Atarou (????) – Atarou
• Nerima Daikon Brothers (????) – Director
• Nono-chan (????) – Matsuko Yamada
• Eagle Sam (????) – Eagle Sam
• Shugo Chara! (????) – Nobuko Saeki
• Tiger Mask (????) – Gaboten
• Tatakae! Osper (????) – Osper
• Tensai Bakabon (????) – Bakabon
• Zenderman (????) – Jimmy

• Ore ni tsuite koi! (1965) - Yumiko Matsuki^[3]
• Panda's Great Adventure (1973) - Pinch^[4]
• Puss 'n Boots: Around the World in 80 Days (1976) - Little Mouse^[5]
• Unico in the Island of Magic (1983) - Monster Child
• Kinnikuman (1984) - Nachiguron
• Pink: Water Bandit, Rain Bandit (1990) - Black^[6]
• Dorami-chan: Wow, The Kid Gang of Bandits! (1991) - Arara^[7]
• Dr. Slump and Arale-chan: N-cha! Clear Skies Over Penguin Village (1993) - Dodongadon^[8]
• Crayon Shin-chan: Pursuit of the Balls of Darkness (1997) - Ball King Nakamure^[9]
• Let's Go! Anpanman: Gomira's Star (2001) - Tartan^[10]
• Crayon Shin-chan: Fierceness That Invites Storm! The Battle of the Warring States (2002) - Yoshino^[11]
• Pokémon: Destiny Deoxys (2004) - Gonbe (Munchlax)^[12]
• One Piece: Baron Omatsuri and the Secret Island (2005) - Keroko
• The Girl Who Leapt Through Time (2006) - Grandmother^[13]
• Let's Go! Anpanman: Apple Boy and the Wishes for Everyone (2014) - Kuutan the Whale
• Chibi Maruko-chan: A Boy from Italy (2015) - Shota Yamada (final film role)^[14]

• Kingdom Hearts II (2005) (Chicken Little)
• Dark Chronicle (????) (Future Rin)
• Popful Mail (????) (Gaw)
• Super Dodge Ball (????) (Misuzu)^[13]

• Chōriki Sentai Ohranger (????) (voice of Bara Hungry)
• Chouriki Sentai Ohranger Movie (????) (voice of Kabochumpkin)
• Ganbare!! Robocon (????) (voice of Robocon)

• Chicken Little (Chicken Little)^[15][16]

• Keiko Yamamoto at Aoni Production
• Keiko Yamamoto at Anime News Network's encyclopedia
• Keiko Yamamoto at IMDb