heya, does anyone know any tranquil, thought inducing mangas similar to kino no tabi, mushishi, shoujo shuumatsu ryokou (girls last tour), kotanoba drive or even moomin? Something with a peaceful and calm feel to it?

Aqua and Aria... doesn't get much slower and peaceful than this.

~4400 manga completed
~1700 ongoing...

thanks~ im in the middle of reading that now lol

Yokohama Kaidashi Kikou by the mangaka of Kotonoba Drive. Actually, his other series would fit as well, so be sure to check out the author's page.

Likewise, other works by the mangaka of Mushishi: Suiiki, Filament, etc.

Aruku Hito
Natsume Yuujinchou
Noramimi
Sumikko no Sora-san
Little Forest

These category tags should also have some good titles under them: Mono no Aware, Existential and Iyashikei.

Seconding Sumikko no Sora-san and Suiiki and Filament.

Also...
Coffee Mou Ippai
Dosei Mansion
Dusk Story - Tasogare Monogatari (and anything else by Tono, really)
Hitsugi Katsugi no Kuro. - Kaichu Tabi no Wa
Majo no Shinzou
Mitsuami no Kami-sama
Omoide Emanon
Yume no Soko