On sunday we decided to head out to Showa Kinen park, about 30 mins out of Shinjuku on the Chuo line. It's a pretty place and there is lots to see and do. We were able to rent bikes and it was a lovely way to get around the park and soak up the atmosphere. We took a picnic lunch and ate it looking over the picturesque pond in the Japanese garden section. You can also rent barbeques there, so I think next time we'll try that.