Kazunari Abe is playing Shinobue (Japanese flute) in the promotional video of Niihama City, his hometown.
The song is called "Eternity", composed by Kazunari Abe.
Enjoy the beautiful Picture.

http://www.youtube.com/watch?v=c_8SwRNPtLQ&feature=em-subs_digest
(English subtitles)

Directed by Katsuji Watanabe
Filmed by Takamasa Inota
Edited by Satoshi Nagao