These folks have been making teuchi (handmade) soba since 1898. Try the zaru soba, which strips it bare so you can taste the flavour of the noodles. The tororo nameko soba is also very good: noodles in a hot soup with boiled mushroom and grated mountain potato. The building has an interesting red-glass sign with white characters and a little roof on it.
Ebisu-Honten
Takayama