Still, Ryuichi Yagi, who heads his own company that used to make neckties but has switched to wallets appeared surprised to learn he was riding on a "green train."
"I had no idea," he said.
Yagi switched his business because of Japan's "cool biz" movement. It encourages male office workers to doff their suits for open-necked short-sleeve shirts to conserve energy by keeping air conditioning to a minimum in hot summer months.
In a sense, he said, "I lead a very green life."
