Some might say he's gone nuts.

A 76-year-old man has decided to spend the latter part of his life in almost complete seclusion on the desert island Sotobanari -- and he's been naked almost the entire time.

Masafumi Nagasaki has lived on the island west of Japan's Okinawa prefecture for two decades, and has no plans to leave.

He told a photographer that he used to clothe himself when boats went by out of embarrassment, but now his vow of nakedness is going strong. He said he wanted to live alone -- besides a few trips a month for food and fresh water -- simply to get away from it all.

Watch the video above to see how Masafumi Nagasaki lives everyday.