The newest film from Studio Ghibli !

Kokurikozaka kara (コクリコ坂から, lit. From Corn Poppy Hill) is a Japanese manga series by Tetsurō Sayama and Chizuru Takahashi which was serialized by Kodansha from January to August 1980 in the shōjo manga magazine Nakayoshi.The manga was collected in two volumes published under the KC Nakayoshi imprint.

The manga was announced to be the source material for an upcoming 2011 Studio Ghibli film to be directed by Gorō Miyazaki, with a script co-written by the director's father, Hayao, and Keiko Niwa, co-author of the scripts for The Borrower Arrietty (2010) and Tales from Earthsea (2006).

Kokuriko is the Japanese spelling of "coquelico" (French) for corn poppy. 

From Kokuriko Hill is Studio Ghibli's newest film production scheduled for summer 2011. The release date seems quite soon to me as their last released film was just a year ago. The Borrower Arrietty showed impressing and persuading results and so far has a score of 8.1 points on imdb. It hasn't yet been premiered in UK nor US; US premiere has been postponed for February 2012. 

The new film will be named Kokurikozaka kara (From Kokuriko Hill) and based on a namesake manga. Again the script will be written by Hayao Miyazaki, drected by his son Gorō (who previously worked on Tales from Earthsea) and produced by Toshio Suzuki. The main theme song is said to be performed by Aoi Teshima, the same singer who sang Teru's song for "Tales from Earthsea"

Kokuriko-Zaka Kara Trailer

By the summary written on various other sites it appears to me to be one of the kind "Whisper of the heart", "Ocean Waves" "Kiki's delivery service" are.
A story set in Shōwa period follows the life of a growing up girl, whose father goes missing and mother is rarely home. Left on her own she has to face all the ordeals the everyday exposes her to. She has to grab the happiness when offered, but face the sadness with a smile and courage as well. Taking care of the shop and her younger sublings, participating in school activities and thus learning to live and slowly or rather quickly, in her case, grow up. However, I might be wrong with these presumptions of mine, let's wait and see. 
More on this as it progresses.