Which importer was it?
As per the other thread people mentioned its not cheap and you are much better off just buying UK. I remember when I was living in Japan about 8 years ago I was getting 240 yen to a £, nothing like that now so outright car cost is going up. Then you have to pay import duty 10%, VAT 20%, shipping (circa £750ish?), port fees, registration, on the road fees including conversions to things like the rear fogs/speedo etc, SVA/MoT.