UTOPIA 最後の世界大戦 is one of the first published work of Fujiko Fujio (Hiroshi Fujimoto [藤本 弘, 1933–1996] and Motoo Abiko [安孫子 素雄, 1934–]) under the name of Fuzio Asizuka (足塚不二雄).
This uploaded version was published in 1954.

So, please don't tag this work as "Fujiko F. Fujio" because this is the work of the TWO authors - "Fujiko Fujio".

I have to apologize that this online version does not have the Title page. The book cover was extracted from other internet resources. I am not sure whether this bookcover is the bookcover of this version.

The quality of this version might not be good, but is able to show us the very early stage of Fujiko Fujio indeed... May we pay respect to the one who scanned this manga. After all I am just the one who uploaded it...