Starting to look into Japan and South Korea

It is possible that I'll be heading to Japan and South Korea in December for 3 weeks or so, and I'm starting to plan my trip now. This is going to be insanely awesome, and I've got to figure it all out, but maaaaaaaaaan this will be amazing.

Some things that look awesome so far:

• Ryokan - a Japanese Inn, often with a hot-spring bath, sliding doors, etc! Sounds SO COOL.
• Shinkansen - high speed train network
• Toyko Disneyland's new ride: "Monsters, Inc. Ride & Go Seek!" - you know why I'm excited about this
  
• Studio Ghibli - the creators of Princess Mononoke, Howl's Moving Castle, and more

Amazing!!!!!