I have several DVDs that I bought from Amazon.com Japan (yes, expensive, but I'm just doing my bit to stimulate the economy by wasting borrowed money). I also picked up a cheap Region 2 player. Just off the top of my head, the DVDs seem to be of good quality and are far less "gimmicky" than the US ones. There is not a lot of on-ride content; the shows are quick tours through the parks. All of the narration is in Japanese (if there's a subtitle option I have yet to find it). Tokyo Disney has also released several excellent special DVDs highlight entertainment offerings throughout the park's history.
If you want to see a lot of on-ride footage, go to YouTube. You can see complete ride throughs of all the big DisneySea attractions and 'Pooh's Honey Hunt' as well.
I haven't watched many of the official releases that are for sale at the resort- but a while ago my friend recommended an unofficial dvd for sale thru deepdiscount.com that has plenty of footage from both Tokyo Disney & Disneyland Paris
Thank you for the responses. I was being dumb, I had just assumed that the Blu-ray regions would follow the DVD region settings. I can only assume that manufactoring issues (placing the two largest markets in the same region) overcame the studios' desire to chop the world up into tiny "release date" markets.
I've used a mid-level HD camera at TDR and DisneySea is amazing on a big screen TV. I can't wait to see what a professional disc will look like.
P.S. - Disney's Blu-ray release of Sleeping Beauty is flat out stunning. If you own a home theater system this is a disc you must have. The endless layers of detail and nuance in the animation marks the peak of Walt's art.