Majik, youare probably correct that Toyota manufacture their diesel engines in Japan. Interesting fact I have been following a Thread on the D4D engine that they import into the UK, on TOC Forums and they are absolutely pulling them to bits at the moment. It seems that they are having all manner of problems with them (especially the flywheel issue- recent thread in Rav4 World forums).
I can,t believe that they would have such problems being the perfectionists they are at Toyota.
If Spwolfx reads this thread he could probably enlighten us further as I know he does contribute to these forums (TOC)
Clare