Hi
There are some of the pointers it is a Japanese Import
1) Imports will not have UK service history or Hybrid Health Check
2) the sat nav and some buttons maybe in japanese
3) Imports may have wind deflectors and extra bodykit and non standard UK reg plates
4) They may have an additional foglight which is required for the UK SVA test
5) They may have parking pole stick out of the front bumper
6) The mileage maybe displayed in KMs and not miles
Here is an example of an import LS600h
2010 Black Lexus LS 600h WALD 5.0 V8 Saloon 4dr Petrol Hybrid CVT 4WD Euro 5 (s/s) (445 ps) for sale for £14,495 in IPSWICH, SUFFOLK (autotrader.co.uk)