If you track the movie down, please share the source Amir. I want to see it too.
The movie is a comedy called Swing Girls. There is a lot of info on the web available for it: http://en.wikipedia.org/wiki/Swing_Girls
Finding a place to buy it through seems challenging as Amazon doesn't sell it anymore. Searching, landed on an expensive by for the BD version: http://www.dvdasian.com/_e/Japan/pro...s_Blu_Ray_.htm
I am sure there are more reasonable places to find it.
Here is a free sample: http://www.mysoju.com/japanese-movie...-movie/part-1/
Seems like a cute movie and quintessential Japanese.
While that was nice, it just doesn't compare to Benny Goodman's rendition.
From the wiki:
"Many of the girls really could not play these instruments , and they did play the performances in the film, after training for only 5 months. To prove this was not movie-magic, a tour was organized after the film with a live CD released shortly after."