J-rock band Glay (profile) performed a last-minute free concert for thousands of fans in Yokohama yesterday. With the temperature rising to a balmy 27 degrees, 15,000 fans gathered at Nipponmaru Memorial Park and enjoyed the strange juxtaposition of a rock band and an old sailing ship. The port of Yokohama is currently celebrating the 150th anniversary of its opening, and it’s 15 years since Glay debuted. Those numbers probably have as much to do with the reported head count as accuracy. Glay are also scheduled to play two shows at the Nissan Stadium in Yokohama in mid-August, with a combined audience of 150,000. Yesterday’s show, the band’s first free live concert in five years, was only announced at 8am. They performed five songs, including “I Am XXX” from their new album, “The Great Vacation Vol.1” to be released on Wednesday. The Nipponmaru, launched in 1930, was used as a training vessel until its retirement in 1984.