-By Actor-

Curtis, Jack

Atragon - Mu Agent 23 (Akihiko Hirata)

Godzilla vs. The Thing - Torahata (Kenji Sahara)

Planet of the Vampires - Captain Sallas (Massimo Righi)

Frankenstein Conquers the World - Army Doctor (Takashi Shimura); Radio Reporter

Gammera, The Invincible - News Announcer (Yuji Moriya?)

Destroy All Monsters - News Reader (Saburo Iketani); UNSC Technician (Yoshio Katsube); SY-3 Astronaut (Wataru Omae)

Fernandez, Peter

Atragon - Jinguji's Lieutenant (???)

Godzilla vs. The Thing - Villager (Senkichi Omura) 

Planet of the Vampires - Wess (Ángel Aranda)

Gammera, The Invincible - Mr. Ueda (Ichigen Ohashi); U.S. Fighter Pilot (Unknown performer)

Godzilla versus the Sea Monster - Ryota (Toru Watanabe)

Son of Godzilla - Maki Goro (Akira Kubo)

Attack of the Monsters

Godzilla vs. The Smog Monster - Yukio (Toshio Shiba)

Grant, Bernard

Mothra - Sen-chan/Bulldog (Frankie Sakai)

Godzilla vs. The Thing - Sakai (Akira Takarada)

Atragon - Susumu (Tadao Takashima)

The Lost World of Sinbad - Sinbad (Toshiro Mifune)

Planet of the Vampires - Dr. Karan (Fernando Villena)

Gammera, The Invincible - Dr. Hidaka (Eiji Funakoshi)

Destroy All Monsters - Doctor Otani (Yoshio Tsuchiya)

Terror Beneath the Sea - Commander Brown (Franz Gruber)

Godzilla vs. The Smog Monster - Doctor Yano (Akira Yamauchi)

Griffis, William

Gammera, The Invincible - Additional voices (as yet unidentified)

Attack of the Monsters

Hammond, Earl

Attack of the Monsters 

Harvey, Kenneth

Godzilla vs. The Thing - Professor Miura (Hiroshi Koizumi) (probable)

Atragon - Detective Ito (Hiroshi Koizumi)

Frankenstein Conquers the World - Military Advisor (Jun Tazaki); Osaka Police Chief (Susumu Fujita)

Gammera, The Invincible - Narrator; Chidori Maru Navigator (Daihachi Kita?)

Destroy All Monsters - Major Tada (Hisaya Ito) 

Kiehl, William

Godzilla versus the Sea Monster - Red Bamboo Commander (Jun Tazaki)

Son of Godzilla - Dr. Kusumi (Tadao Takashima); Narrator

Linden, Hal

Godzilla versus the Sea Monster - Yoshimura (Akira Takarada)

Destroy All Monsters - Katsuo (Akira Kubo)

Lobbin, Peggy

Attack of the Monsters 

Martin, Lucy

Atragon - Makoto Jinguji (Yoko Fujiyama)

The Lost World of Sinbad - Sobei (Mitsuko Kusabue)

Planet of the Vampires - Sanya (Norma Bengell)

Frankenstein Conquers the World - Sueko (Kumi Mizuno) 

Gammera, The Invincible - Nobuyo (Michiko Sugata)

Godzilla versus the Sea Monster - Daiyo (Kumi Mizuno)

Son of Godzilla - Riko Matsumiya (Beverly Maeda)

Destroy All Monsters - Kilaak Queen (Kyoko Ai)

Godzilla vs. The Smog Monster - Toshie Yano (Toshio Kimura)

Morely, Rita

Attack of the Monsters 

Morrison, Bret

Mothra - Dr. Harada (Ken Uehara)

Godzilla vs. The Thing - Kumayama (Yoshifumi Tajima)   

Atragon - Admiral Kosumi (Ken Uehara)

Frankenstein Conquers the World -  Reporter (Kozo Nomura); Akita Oil Field Employee (???)

Destroy All Monsters - Dr. Yoshida (Jun Tazaki)

Orr, Corrine

Gammera, The Invincible - Toshio (Yoshiro Uchida)

Attack of the Monsters

Robinson, Larry

Godzilla vs. The Thing - Nakamura (Yu Fujiki)

Atragon - Yoshito Nishibe (Yu Fujiki)

The Lost World of Sinbad - Premier (Tadao Nakamaru)

Frankenstein Conquers the World - Kawai (Yoshio Tsuchiya)

Gammera, The Invincible - Aoyagi (Junichiro Yamashiko)

Godzilla versus the Sea Monster - Nita (Hideo Sunazaka)

Son of Godzilla - Ozawa (Kenichiro Maruyama)

Destroy All Monsters - Moonlight SY-3 Countdown

Attack of the Monsters

Rose, Norman

Destroy All Monsters - Narrator

Rubinstein, Paulette

Godzilla vs. The Thing - Shobijin (The Peanuts)

Gammera, The Invincible - Kyoko (Harumi Kiritachi)

Attack of the Monsters

Van Tell, Terry

Godzilla vs. The Thing - Shobijin (The Peanuts)

-By Film-

Mothra (Columbia, 1962)

Sen-chan/Bulldog (Frankie Sakai) - Bernard Grant

Dr. Harada (Ken Uehara) - Bret Morrison

Godzilla vs The Thing (American International, 1964)

Sakai (Akira Takarada) - Bernard Grant

Professor Miura (Hiroshi Koizumi) - Kenneth Harvey (probable)

Nakamura (Yu Fujiki) - Larry Robinson

Shobijin (The Peanuts) - Paulette Rubinstein, Terry Van Tell

Torahata (Kenji Sahara) - Jack Curtis

Kumayama (Yoshifumi Tajima) - Bret Morrison

Villager (Senkichi Omura) - Peter Fernandez 

Warning from Space (Four Star International, 1964)

Pairan Leader (not voiced) - Jack Curtis

Dr. Komura (Bontaro Miake) - Bret Morrison
Dr. Matsuda (Isao Yamagata) - Larry Robinson
Hoshino (Toshiyuki Obara) - Larry Robinson

Atragon (American International, 1965)

Susumu (Tadao Takashima) - Bernard Grant

Makoto Jinguji (Yoko Fujiyama) - Lucy Martin 

Yoshito Nishibe (Yu Fujiki) - Larry Robinson

Admiral Kosumi  (Ken Uehara) - Bret Morrison

Detective Ito (Hiroshi Koizumi) - Kenneth Harvey

Mu Agent 23 (Akihiko Hirata) - Jack Curtis

Jinguji's Lieutenant (???) - Peter Fernandez 

The Lost World of Sinbad (American International, 1965)

Sinbad (Toshiro Mifune) - Bernard Grant

Premier (Tadao Nakamaru) - Larry Robinson

Sobei (Mitsuko Kusabue) - Lucy Martin

Frankenstein Conquers the World (American International, 1966)

Sueko (Kumi Mizuno) - Lucy Martin

Kawai (Yoshio Tsuchiya) - Larry Robinson

Military Adviser (Jun Tazaki) - Kenneth Harvey

Osaka Police Chief (Susumu Fujita) - Kenneth Harvey

Army Doctor (Takashi Shimura) - Jack Curtis

Reporter (Kozo Nomura) - Bret Morrison 

Radio Reporter - Jack Curtis

Akita Oil Field Employee (???)   Bret Morrison

Gammera, The Invincible (Harris Associates, 1966)

Dr. Hidaka (Eiji Funakoshi) - Bernard Grant 

Aoyagi (Junichiro Yamashiko) - Larry Robinson

Kyoko (Harumi Kiritachi) - Paulette Rubinstein

Toshio (Yoshiro Uchida) - Corrine Orr

Nobuyo (Michiko Sugata) - Lucy Martin 

Chidori Maru Navigator (Daihachi Kita?) - Kenneth Harvey 

Narrator - Kenneth Harvey

Mr. Ueda (Ichigen Ohashi) - Peter Fernandez

U.S. Fighter Pilot (Unknown performer) - Peter Fernandez

News Announcer (Yuji Moriya?) - Jack Curtis

William Griffis

Godzilla versus the Sea Monster (Walter-Reade Organization, 1967)

Yoshimura (Akira Takarada) - Hal Linden

Daiyo (Kumi Mizuno) - Lucy Martin

Nita (Hideo Sunazak) - Larry Robinson

Ryota (Toru Watanabe) - Peter Fernandez

Red Bamboo Commander (Jun Tazaki) - William Kiehl

Son of Godzilla (Walter-Reade Organization, 1968)

Dr. Kusumi (Tadao Takashima) - William Kiehl

Maki Goro (Akira Kubo) - Peter Fernandez

Riko Matsumiya (Beverly Maeda) - Lucy Martin

Ozawa (Kenichiro Maruyama) - Larry Robinson

Narrator - William Kiehl

Destroy All Monsters (American International, 1969)

Katsuo (Akira Kubo) - Hal Linden

Dr. Yoshida (Jun Tazaki) - Bret Morrison

Dr. Otani (Yoshio Tsuchiya) - Bernard Grant

Kilaak Queen (Kyoko Ai) - Lucy Martin

Major Tada (Hisaya Ito) - Kenneth Harvey

Narrator - Norman Rose

SY-3 Astronaut (Wataru Omae) - Jack Curtis

News Reader (Saburo Iketani) - Jack Curtis

UNSC Technician (Yoshio Katsube) - Jack Curtis

Moonlight SY-3 Countdown - Larry Robinson

Destroy All Planets (AI-TV, 1969)

Attack of the Monsters (AI-TV, 1970)

Peter Fernandez

Earl Hammond

Peggy Lobbin

Rita Morely

Corinne Orr

Paulette Rubinstein

William Griffis

Larry Robinson

Return of Giant Majin (AI-TV, 1970)

Terror Beneath the Sea (Regency Productions, 1970)

Commander Brown (Franz Gruber) - Bernard Grant

Yog - Monster from Space (American International, 1971)

Gamera vs. Monster X (AI-TV, 1971)

Godzilla vs. The Smog Monster (American International, 1972)

Dr. Yano (Akira Yamauchi) - Bernard Grant

Toshie Yano (Toshie Kimura) - Lucy Martin

Yukio (Toshio Shiba) - Peter Fernandez