A lot of people have asked about this over the years and at least we have one for Subaru now to check JDM recalls!
I believe this is worldwide but for our purposes I can confirm it works on JDM chassis #'s. Do keep in mind that known faults such as the BE5/BH5 Legacy B4 Turbo Center diff problem was apparently not recalled so nothing will show or help in this case. It is a bit scary but apparently a lot of models in that era had the possibility of a leaky gas tank due to high pressure in some situations!
Here is the Subaru recall checker link: http://recall.fhi.co.jp/lqsb/recall.do
Thanks to @MikeRWK for sharing this helpful info!