(Japanese) mangas with the most gorgeous covers? It's okay if the covers are simple or if ...

Bless is a good one I'd say.

Thanks, and I agree! Bless and Blue Period are my favourites.

My absolute favorite have to be the Canis, Dear Hatter covers from the official eng copies. So colorful and bold!

Seven days

I have always loved the cover Sakura Gari and Itou-san (Kuraka Sui)

https://www.mangago.zone/read-manga/monster_and_ghost/
https://www.mangago.zone/read-manga/kono_koi_wa_hoshi_ni_wa_negawanai/
https://www.mangago.zone/read-manga/you_are_my_angela/
https://www.mangago.zone/read-manga/barefoot_angel/
https://www.mangago.zone/read-manga/innocent_sakamoto_shinichi/
https://www.mangago.zone/read-manga/innocent_rouge/
https://www.mangago.zone/read-manga/drcl_midnight_children/
https://www.mangago.zone/read-manga/kami_to_yobareta_kyuuketsuki/
https://www.mangago.zone/read-manga/the_concours/

https://www.mangago.zone/read-manga/kimi_no_yoru_ni_fureru/

https://www.mangago.zone/read-manga/on_doorstep/

https://www.mangago.zone/read-manga/haruka_tooki_ie/ (This is a must)

https://www.mangago.zone/read-manga/fangs/

https://www.mangago.zone/read-manga/madk/

I love those covers so much, along with the back covers! Anything Zakk draws is instantly gorgeous.

Thanks guys! I've already seen most of these and love all of them. I guess I've already seen the best BL has to offer in terms of art style. Appreciate the non-BL recs, they're stunning.