There’s a soothing hum to laid-back Fukuoka, the largest city on the Japanese island of Kyushu. It’s hard to miss on a weekend afternoon as you stroll down Meiji-dori Avenue, the city’s wide downtown spine, passing places like the Kabuki theater Hakata-za and the Fukuoka Asian Art Museum. Eventually, you’ll reach the slow-flowing Naka River, whose banks are lined with the traditional open-air food stalls known as yatai, a signature attraction in this culinary and arts haven.