Soba (そば) is a type of thin Japanese noodles made from buckwheat flour. In Japan, most thin noodles are called as soba, while thick noodles made from wheat are called udon.
You can served soba either chilled with a dipping sauce or in a hot broth as a noodle soup. Cold soba is traditionally served on a sieve-like bamboo tray called a zaru and commonly garnished with bits of dried nori seaweed; it is served with a dipping sauce known as soba tsuyu on the side. The tsuyu is a strong mixture of dashi, sweetened soy sauce and mirin.