Machiko's place is at a very convenient location. It's about a 5 min. walk (without people traffic) to Shin-Okubo station, which is one stop away from Shinjuku via the Yamanote line. Space is limited and the amenities are basic, so if you're planning on being out all day and just coming back here to get some sleep, shower, and bring some takeout, then this place is perfect. Korea-town is literally just outside with restaurants, cafes and Shibuya, Harajuku, Ikebukuro are all easily accessible within 20 minutes.