Jeff Layfield and his wife, Mamiko, left Hawaii to retire in Japan.Provided by Jaff Layfield.Jeff Layfield and his wife, Mamiko, left Hawaii and retired on Suo-Oshima, an island in Japan.They bought one of Japan's vacant homes, known as an akiya, for about $25,000."In most places in the US, we'd have to live in a very rural area for me to be able to afford a home," Layfield said.Jeff Layfield spent years imagining where in the US he and his wife…