Great spot, sure you have to pay to get in but it is well worth it. Go early and plan to stay for the whole day. Take a picnic lunch. Our children 1st and 2nd graders loved it. Highlights were the cycling track where you can hire a wide range of bikes and ride around a well maintained road through the forest. And the adventure confidence course which is made up of a number of wooden structures the kids climb, clamber, swing and jump through. There are lots of vending machines for drinks through out the park and a few food options like a restaurant and snack shop. If we go back we will take a picnic for sure. Nothing wrong with the restaurant and we were lucky to get in at a time when the queue was short. I can imagine it gets really busy with long waits at some times. Beware that the park is massive so check out their website and pick the right entrance based on what you want to do. We entered by the West entrance which is close to the adventure course and not to far from the cycling course. We would do the same next visit. We drove and there appears to be huge amounts of parking near all entrances.

We visited for a nice cycling spot in Tokyo suburb. Not so known even among locals, compared to the famous Shimanami Kaido or Arakawa bank, this is sort of hidden gem for family or casual cyclists. The total length for the whole circuit is around 16km. Various rent-a-cycle vendors are available with reasonable rent fee (e.g. 500JPY per 3hours). Traveling by train and bus is most recommended, as traffic is quite congested to reach here from anywhere, not to mention parking space. 東京近郊のサイクリングコースを探してたどり着きました。しまなみ海道ほどの知名度はないですが、首都圏で家族連れ、サイクリング初心者には最適かと思います。一周16kmをレンタル自転車で廻るのに出費は入園料420円にレンタルサイクルで500円前後でいけます。 ここへの交通手段ですが、断然電車とバスを勧めます。高速と周辺道路と駐車場の混雑は半端なさそうですので。