The songs by orange pekoe that I've posted in the past have been categorized as both jazz and Shibuya-kei, and that's only two of the genres that identify this band from Hyogo Prefecture. Kazuma Fujimoto and Tomoko Nakajima（藤本一馬・ナガシマトモコ）have also brought Latin, Indie Pop and the general J-Pop to the fore, but this particular single is absolutely pure joyous jazz.
Being an old swing fan, I really like orange pekoe's 6th single "Gokurakucho" from May 2003. It's the type of song that would get me thinking of those days back in Japan when I really got into the swing (pun intended) of things when it came to jazz. I've always appreciated modern takes on the old stuff (yes, I'm fully aware that the single came out 15 years ago). And "Gokurakucho" is one of those numbers that probably could get the folks back in the day to snap their fingers and hit the dance floor.
If the usual pattern holds true, then Fujimoto composed the song while Nakajima wrote the lyrics and provided her snazzy vocals. "Gokurakucho" reached No. 25 on Oricon and was also included on orange pekoe's 2nd album "Modern Lights" from July 2003. That peaked at No. 6.