This two-story building is a Japanese restaurant. Probably this used to be some body's home....small, traditional....or now almost antique house. At the entrance, you will be asked to remove your shoes....This house was built at the end of 1950's.
I was suggested to have lunch meeting there and we both ordered sashimi set menu. The price was 850 yen.
Good deal for this price, please check the photo above.
2 min. from Ichigaya station. ( JR exit.) You will see Bank of Mitsubishi UFJ Tokyo, pass that bank and then next is Risona Bank. When you pass the Risona, turn right. This house will be on your right in 20 secs.