TsutaFuji is a small and cozy restaurant with only 11 seats at the counter, but it is popular with a continuous line of customers on holidays.
Their chuka-soba soup is made from pork bones and seafood, and is especially rich in flavor from small dried sardines.
Toppings include plenty of pork back fat, chashu pork, and chopped leeks, but the taste is not as thick or heavy as it appears.
The noodles are medium thin and straight.