Shigeki...wow! So beautiful, and beautifully done..Every aspect perfectly executed. Completely captures the spirit of bossa. You are so lucky to have had live professionals to record this track! The vocal is just right, the spirit of the lyric is so faithful to the genre, the chord changes (modifying on the 2nd 4 beats, such as moving m7 to m6), the guitar playing itself, the tone and nature of the piano solo...I can speak for this genre, but I'm sure it is true for many other styles--when you so totally capture the spirit, and all the elements are in balance, your song moves into another higher dimension of professional excellence.
Thanks for going into the past to share this..and I hope I will hear more like it!