Almost Transparent Blue (限りなく透明に近いブルー, Kagirinaku Tōmei ni Chikai Burū, "Almost Infinitely Transparent Blue") is a 1976 novel, written by Japanese author Ryū Murakami, that features a portrait of narrator Ryū and his friends trapped in a cycle of sex, drugs and rock 'n roll during the 1970s.

The near-plotless story weaves a vividly raw, image-intensive journey through the daily monotony of drug-induced hallucinations, vicious acts of violence, overdoses, suicide, and group sex.

Murakami submitted the novel to the literary magazine Gunzo's debutant contest, in which it won the first prize.

26-year-old Murakami made his directorial debut with a film adaptation of his novel Almost Transparent Blue, which he also scripted.

[2] Hidenori Taga and Kei Ijisato under Kitty Records produced the film, starring Kunihiko Mitamura (Ryu), Mari Nakayama (Lilly), Haruhiko Saitô (Yoshiyama), Keiko Wakasa (Kei), Narumi Tokura (Reiko), Yuri Takase (Moko), Goro Masaki (Kazuo), Togo Igawa (Okinawa) and Akiko Nakamura (Mari).