i love this sound.
it’s Original Sound Track by Joe Hisaishi.
A Scene at the Sea (“That summer, the calmest ocean”) is a 1991 Japanese film written and directed by Takeshi Kitano.
above is scene at the sea #1
you can select whole scene here http://www.youtube.com/results?search_query=A+Scene+at+the+Sea
at least see the last episode. you may understand how this sound beautiful