This Michelin starred ramen place near Sugamo station was well worth the trip. Be there early in the morning to pick up a ticket for a time slot later in the day. How to spend the time between? The nearby Rikugien park is great, in the opposite direction there is a nice market (maybe only on weekends, I was there on a Saturday with lots of elderly shoppers – somewhere online I read the term old people Harajuku which sums it up perfectly) and there is also a great tram, the Toden-Arakawa-Line. Once back to Tsuta be prepared for some of the best ramen you’ve ever had.