Hello,
I too have a Celsior Mk2 1994 have you also discovered that the radio only picks up radio2 because the frequency range is different in Japan,you can apparently get convertors for this but I use the excellent CD changer for music so not bothered about the radio.
If your considering buying make sure that the speedo has been converted to MPH and you get a record of this with the original mileage in KM converted to Miles and the speed limiter is deactivated ( 113 MPH I think max speed in Japan).Service history with Jap imports is hit and miss.
Also don't forget insurer's pull faces with imports my normal insurer Esure wouldn't cover me but I got a good deal with a specialist ( pm me for details).
You may also find the car fitted with air suspension,check it well as very expensive to repair/replace.
As a guide I paid £3700 for mine in A1 condition,after market 17" chrome alloys and a certified 38,000 miles.
some pictures ( not very good I didn't take them)
http://i39.photobucket.com/albums/e191/ste...06/Lexus010.jpg
http://i39.photobucket.com/albums/e191/ste...06/Lexus009.jpg