1. It's faster than the USA-based website.
2. You can quickly search for award seats +/- 7 days (I wish they had a +/- 3 days option...)
3. You can search for seats on DL, CO, etc. without the NW junk. This is very useful for searching for "gateway" flights (flights to/from cities with limited service... Asia, Hawaii, Europe, etc.) and flights to that gateway.
Originally Posted by loomis
What do you find more valuable about the Japanese version? I was searching for an award flight from GRR to SJU for the end of January and it gave me nothing, but plenty of options using the normal US site.