EBRU ERKE Osaka, known as the hub of street food; the elegant Kyoto, steeped in tradition; Tokyo , buzzing with energy and life... come along as we take a brief journey through Japan . "Don't be shy, feel free to slurp loudly," says Nick Yeah, who leads the street food tour. "There's no embarrassment; in fact, the louder you slurp, the more acceptable it is. Bring the bowl close to your mouth, grab the noodles with your chopsticks, and slurp them along with the broth." Nick, who relocated to