Soba noodles are one of the most popular types of noodles in Japan. They can be served in many different ways, hot or cold. A good source of protein, they do not contain any fat or cholesterol. Most soba noodles are made from a combination of buckwheat and wheat flour, but Juwari Soba Noodles are made from 100% buckwheat flour, which means it is gluten-free. Made in Hokkaido, this premium brand of soba noodles contains only water and buckwheat flour, with no additives. That means you can enjoy soba noodles that deliver a purely rustic, nutty, earthy flavor that pairs very well with both cold mentsuyu dipping sauce and hot dashi broth. How to make simple cold juwari soba (Zaru Soba): 1.