Yutaka Sō
Writing
Apparently it is a pseudonym used individually and collectively by various people working around the director and producer Kan Mukai on his films and at his production companies.
Titles
Blue Film Woman
The Bite
Diary of a Violated Virgin—Female
Modern Female Ninja: Flesh Hell
Forbidden Technique to Tie a Lady
Girls' Dormitory
Shameful Technique
Sexy Partners
Dark Japanese History: Virginity and Rape
Jôji no Atosaki
Zeppin no tsubo
Aru aibu!! Zubunure
Jitsuroku: Maruhi tsûkin chijo nikki
Monzetsu kôkyû toruko: Jun nama arai
Chikan zurousu dorobô
Gakusei-zuma
Savaged and Ravaged
Inmon: Shojo tsuma kantsû
Night Office Lady Diary: Flesh Doll
Virgin blues: Nurete sayônara
Tortured Women's Dark History
Tattooed Slave Wife
Female Teacher: Exposed
Uniform Blackmailer
The Shocking History of the Death Penalty
Soft Skin Lynching
Groper Bullet Train
Women's Dormitory (Sexual) Crimes
Female Teacher: Violated to Death
Crying Rope, Missing Black Hair
Hometown Porn Girl 18! Seeding Festival
Shocking! A Villain's Resume
Japanese Pornography: Kawachi's Erotic Widows
Real Cabaret Performance: 40 Minutes
Japanese Night Crawl Festival
Groper Express: Coming Soon
Confession of a Virgin: I Want to Be Number Two
Apartment Wife: Daytime Prostitute
Attachment of a Virgin
Kin'yôbi no mesu inu
Night Office Lady: Pleasure Room
Inpu nobori ryû
The Flesh Clock of Men and Women
Forbidden Affair
History of Japanese Evil and Hatred
Flesh-Bullet Widow
The Secret Story of the Onsen Geisha: Wet Pillow
The High School Girl Who Knew Too Much
Noctiluca
Furusato poruno chikubi korogashi
Red Laboratory: Please Bully Me
Groper Hell
Pleasure Doll
SM ketteiban: Kusari to mesu inu
The Scream of a Female Doctor
Agony!! Pacifier Widow
New Edition: The Complete Collection of Turkish Japan
The Crazy Widow
Mrs. Peeling
Complete Collection of Naked Women's Pleasure