Sex Highway (ＳＥＸハイウェイ　女の駐車場) 49 years old

Roman Porno from 1974.

Credits

Name	Character
Moeko Ezawa She was 35, now 85 years old
Yūko Katagiri She was 22, now 72 years old
Kokan Katsura
Hidetoshi Kageyama He was 24, now 74 years old

Name	Department
Shinya Inoue as Editor.	Editing
Chiho Katsura as Screenplay. He was 45 (now 95) years old	Writing
Naozumi Yamamoto as Original Music Composer. He was 41 (69) years old when He died	Sound