Jesse Johnston: Given the sheer size of the park, you'd never know how many people were there, but it's very obviously a popular spot. Alcohol and picnics are encouraged and there's a dedicated bike path for cyclists
Bubble: Onsen in a suburban quiet Tokyo area. It's more original and cheap. You get a towel for some extra bucks. Has a restaurant, a zen garden, sauna, jacuzzi and a relaxing spring in the open.
Amiro P.: What a great place to hang out, chill have a coffee and read. One of the best book shops I've ever visited. it's open everyday until 2am so no need to hurry
Simple Discoveries: Wake up really early (or don't sleep) if you want to hit the Tuna Auction as only 120 spots available. A 3am arrival got us there just in time!
sputneek: This way-too-cool bike-surfshop cum café tucked in a Harajuku lane serves really good coffee. Sandwiches are hearty meals with fries and salad. Really nice place to just 'zone out' from the crowd.