Since I posted this one back in 2010, I had no idea what song this man was performing.
I asked that anyone who recognized it to contact me. On Dec 23, 2021, Dave Doverspike sent me a message stating,
"On your Tripod site under songs you have one listed as "I have no idea"
The song is Amami Island Song "Sutotonbushi" being sung by Koji Mori of Fukumorido."
Dave-san, Arigatou gozaimasu.

S. A. Mick McClary, Great Falls, Montana, USA