Earlier today, the first trailer for Kono Sekai no Katasumi ni (In This Corner of the World) began streaming online.

https://www.youtube.com/watch?v=BF8bxTEMIpY

In addition, a promotional visual for the film was released, which confirms a 2016 release date.

To AlL The Corners Of The World Visual 002 - 20150801

Kono Sekai no Katasumi ni is based on Fumiyo Kouno’s award-winning manga of the same name. The project will be directed by Black Lagoon director Sunao Katabuchi, and animated by studio MAPPA. GENCO will handle overall production.

The film began its existence as a crowd-funded endeavour, with funds being collected via crowdfunding platform Makuake. Collections began on March 8, at 11:00 AM local time. At the time, the goal was a lofty 20 million yen ($161,427.01 USD). The feature shattered its initial goal in ten days and went on to raise a total of 36,224,000 yen ($292,376.61 USD) by the time collections closed on May 29.

Source: Crunchyroll