Hisao’s place is super convenient, and considering it’s Tokyo also pretty inexpensive. It’s 10 minutes walking from the Uguisudani station, which is a Yamanote-Line stop, which is the most convenient train/subway line for foreigners wanting to explore Tokyo.
Also Hisao fixes super nutritious and yummy sandwiches!
Around the corner is a local (read cheap) grocery store called Inageya, attached to it in the 2nd floor is a ¥100 shop.
Unlike places like Asakusa or Roppongi you won’t run into many foreigners in this neighborhood.