I visited for a day almost 20 years ago. I'm sure alot has changed since then. We enjoyed it very much. Some things in Japanese, some in English. Some rides very much teh same, while some had new twists. The Castel has it's own walk thru interactive attraction. Back then it was all themed on
The Black Cauldron. A guest is chosen from the group to vanquish the evil Horned King witha mighty sword. Yes, I was that hero and I have the Medal to prove it!
Oh, and there were lines to rival the busiest day at WDW. As an american, you tend to stand out in a sea of japanese.