They were both (if I remember correctly) sold in America, just not with those names, as were others.
Toyota Soarer = Lexus SC300
Toyota Altezza (where the name came from for the riciest taillights ever) = Lexus IS300
The Toyota Chaser = Sold for a short time until the early 90s as the Toyota Cressida
Toyota Windom = Lexus ES300
Toyota Aristo = Lexus GS
en.wikipedia.org