Gampi fiber is rare and fickle. It is almost impossible to cultivate, and needs to be harvested by gleaners. The two most important factors for its happiness are soil and light: it should be not too much light, but not too much shade, and the soil should be a mix of soft and rocky. It takes 7 years for Gampi to reach its first harvest, and after that it can be harvested every 3 years.  Gampi looks like young Sakura (cherry tree) when you harvest it, so you have to be very careful to cut down the correct plant! Its original purpose was to hold gold leaf.