I am sorry for not having fully answered your question. According to [Junji Ito's Goodreads page](https://www.goodreads.com/author/list/8483.Junji_Ito), his five most popular works are, in order:
1. Uzumaki
2. Tomie
3. Gyo
4. Shiver: Selected Stories
5. Fragments of Horror

Do note however, that *Uzumaki: Spiral into Horror, Vol. 1* (otherwise at number 2 in the list) has been discounted on the basis of being part of the first literary work in the list.
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