Yumiko indeed a great host. She waited for us at the apartment and gave us clear guidance. We like yumiko’s place. Both metro and JR station consider near in Japan’s neighborhood. Both station reachable in 10mins by walking. Just 2 stops from JR itabashi to shinjuku. You can also take longer route to shinjuku if you have metro pass with you. Her place is clean and full of amenities. Just nice for a group of 4. Highly recommended!