Hear five haunting songs from the late '60s to early '70s. We file them under jazz only by default. . . . One of the records was Minoru Muraoka's Bamboo. I'd not come across Muraoka's name in any of my searches, so I listened patiently to the koto (a stringed instrument similar to a zither) introduction to "The Positive and the Negative." A rolling bass line set the stage for funky-enough drums that soon gave way to Muraoka's shakuhachi, or bamboo flute. A cascading koto sat in for chicken-scratched guitar. "What in the hell do you call this?" I asked. "Shakuhachi Jazz," Ogawa replied, with an "Isn't it obvious?" air. He then sheepishly admitted that the album wasn't for sale, as Muraoka's discography was extensive and his records were rare.