Soba that is made with newly harvested buckwheat is called "shin-soba". Various kinds of instant noodles are produced, including ramen, udon, soba, yakisoba, and pasta. Apart from rice, staples in Japanese cuisine include noodles, such as soba and udon. Apart from rice, staples include noodles, such as soba and udon. Sold at "soba/udon" restaurants. "Kakiage" may top a bowl of (hot soba in broth) or udon. The "tororo" may also be poured over noodles to make "tororo udon/soba". This contrasts with the mainland soba, which is buckwheat noodles. Kawara soba (hot tile noodles) is a popular food in Yamaguchi. The noodles are known as Shinshu Soba. Sometimes "udon" is used as a replacement for the Chinese-style "soba" and called "yakiudon". When served over "soba" (buckwheat noodles), it is called "tempura soba" or "tensoba". Another variety of yam, "jinenjo", is used in Japan as an ingredient in soba noodles. This means that there were nearly 2 sushi restaurants for every soba restaurant. However, as there were many immigrants from Okinawa, it uses less broth like Okinawa soba.