There are two manga adaptations of this movie. However, the information might be wrong as they're really rare.
Title: Uchu Enban Dai-Senso (宇宙円盤大戦争) Original date of publication: 1975-08 Original publication: Boken Oh (冒険王)(Natsuyasumi Dai-Zokango, 夏休み大増刊号) Original editor: Akita Shoten (秋田書店) Art/Manga: Yoshimitsu Shintaku (漫画:新宅よしみつ)
One-shot of 40 pages. Never compiled or reprinted. No images.