YUHO Premium Shirataki Noodles. 3 Pack Inside Konjac Noodles 3 Pack Inside Konjac Fettuccine 2 Pack Inside Konjac Rice As you may guess from the name shirataki noodles originated in Japan. They are made from the Konjac root also called White Yam or Devil’s Tongue. They have a gelatinous texture and are a good source of the dietary fiber Glucomannan. To make the noodles the Glucomannan fiber is extracted from the Konjac root and mixed with water and limewater. This creates a gelatinous substance called konnyaku which is made into noodle-like or rice-like substances. The finished noodles are 97% water and 3% indigestible fiber making them zero-calorie noodles.