Umimachi Diary

Umimachi Diary
Cover of the first volume
海街diary
Manga
Written by	Akimi Yoshida
Published by	Shogakukan
Demographic	Josei
Magazine	Flowers
Original run	April 26, 2007 – present
Volumes	7
Live-action film
Our Little Sister (2015)

Umimachi Diary (Japanese: 海街diary^?, lit. "Seaside Town Diary") is a Japanese josei manga by Akimi Yoshida serialized in Monthly Flowers magazine.

A film adaptation titled Our Little Sister directed by Hirokazu Koreeda and starring Haruka Ayase, was first announced in the June 2014 issue of Monthly Flowers. The film was released on June 13, 2015.

The eldest sister of the Kouda family. She works as a nurse in a hospital. Very serious and reliable. She is 29 years old.

Second sister of the Kouda family. She works as an office lady in a bank. She loves drinking alcohol and is pretty embarrassing when drunken. She often dates younger and handsome boys. Once, she dated Tomoaki Fujii, one of the protagonists of Lovers' Kiss (former series of Akimi Yoshida also set in Kamakura). She is 22 years old.

The younger sister of Kouda family. She is 19 years old. She works in a sports articles shops.

She shares the same father as the Kouda sisters. She is 13 and still in junior high school. She is very reliable and serious, and that got Sachi's attention. She lived in Sendai with her father and mother but after her mother's death, her father married Youko in Yamagata. She met her sisters at her father's funeral, and moved to Kamakura to live with them. She is very good at soccer.

It won the Excellence Prize for manga at the 2007 Japan Media Arts Festival Awards and the 6th Manga Taishō. It was also nominated for the 1st Manga Taisho, where it came in 3rd place, for the 12th Tezuka Osamu Cultural Prize, where it came in 2nd place, and for the 13th Tezuka Osamu Cultural Prize. In 2016, the manga won the 61st Shogakukan Manga Award in the General category, sharing it with Sunny.