The place is very special in the middle of the city and the service is accurate and kind. Only one thing : the soba portion is very small ( we trusted the pictures here, but after you still hungry ).
Full at 11:30(opening) with a short queue. Long queue at 12:15. The tempura looks amazing, gonna get that next time. (You'd probably need more than just soba for lunch.)
Kanda station (Yamanote line), east exit; (Ginza line), exits 5, 6 or Ogawamachi station (Shinjuku line), exit A3 or Awajicho station (Marunouchi line), exit A3.