I went to this park with my friends one weekend in the fall last year. It was a pleasant temperature the whole time, the leaves were changing, and best of all it was not peak season so there were zero lines.

Every ride is pretty decent considering the size of the park. Jupiter is the biggest roller coaster and I believe it has a record for being the oldest wooden one in Japan. It is also about a mile long of track. It is fun but it rattles your whole body. Even if there is no line and you could ride it 3 times back to back, you probably shouldn't (speaking from experience...my neck was killing me).

I am a very short person and was able to go on all of the rides. However, two of my taller friends (6ft and up) were too tall for some of the smaller rides. This park is very much Japan sized.

You can easily ride everything in the park at least once in a 2 hour period. No need for longer unless you want to take breaks for snacks.

Also, the go-cart ride is a joke. It is so slow and you only drive by yourself in a track that is as wide as the car. You don't even need to steer, just let the road barriers bump you. This was also a ride that my tall friends did not fit on.

It was an overcast day in February, but most of the amusement park rides were active.
Children were in raptors with the ease of getting rides. A good number of food operators were active and drinks were available.
A nice amusement park...not in the Disneyland league of course but nicely set out and easy to access.

It is nice amusement park, but many things and shops are not open. Can only get food and drinks on the machine. We only have 3 hours there but got most of the ride, not many people there though.