Umimachi Diary (海街diary) is a Japanese manga series written and illustrated by Akimi Yoshida. It was serialized in Shogakukan's josei manga magazine Monthly Flowers from the August 2006 issue to the August 2018 issue (both sold on June 28 of their respective years). A film adaptation titled Our Little Sister, directed by Hirokazu Kore-eda and starring Suzu Hirose, was first announced in the June 2014 issue of Monthly Flowers. The film was released on June 13, 2015. A spin-off manga series titled Utagawa Hyakkei has been serialized in Monthly Flowers since July 26, 2019.

Characters

Volumes

Reception

Umimachi Diary won the Excellence Prize for manga at the 2007 Japan Media Arts Festival. It was also nominated for the 1st Manga Taishō (Cartoon Grand Prize), where it came in 3rd place, and won the 6th Manga Taishō in 2013. It was nominated for the 12th Tezuka Osamu Cultural Prize in 2008, where it came in 2nd place; and for the 13th Tezuka Osamu Cultural Prize in 2009. In 2016, the manga won the 61st Shogakukan Manga Award in the General category, sharing it with Sunny. In 2019, along with Demon Slayer: Kimetsu no Yaiba, Umimachi Diary ranked #10 on the 19th "Book of the Year" list by Da Vinci magazine.