Hokuou Joshi Åsa no Nippon Saihakken Local-Tabi
北欧女子オーサのニッポン再発見ローカル旅 · ほくおう じょし おーさ の にっぽん さいはっけん ろーかるたび
est. Rough estimate based on volume count, reprints and magazine — not an official figure
Overview
The countryside is jam-packed with mysteries! — Nordic girl Åsa once again goes out into Japan in search of mysterious things – this time, it's Okinawa, Kyoto, southern Tohoku, Hiroshima, and Fukuoka. In Kyoto she's a geisha for a day, in Okinawa she's surprised when the convenience store clerk asks her if she wants her rice ball heated up, and in Tohoku she's moved by how vegetables are sold in unmanned stalls on the side of the road. (Soure: Kadokawa, translated) Note: The chapter count includes one epilogue chapter.
Source: AniList
External databases: MADB · AniList
How to compare editions, collected volumes and ISBNs / Sources, updates and corrections