Sorry to be that guy but the crown majesta is not the same as the ls430 that would be the celsior.
The crown predates lexus buy 40 odd years infact its the longest constantly produced sedan in the world. but for the most part has only been available new in Japan, bar short international runs in the erly days and in China in more resent times.
Due to lexus not being avalerbul internally in Japan untill 2009 there were a number of lexus modules sold under the toyota badge in japan, some off the top of my head are
Lexus GS = toyota aristo
Lexus LS = toyota celsior
Lexus IS = toyota alteza
In japan the crown alongside the toyota Century were toyotas flag ship sadans over and above the celsior aka LS430 but when lexus became available in 2009 they rolled all the doubles into 1 badge under lexus and promoted the LS range to top spot.
As a rezolt the 12gen toyota crowns / 4th gen majesta are probably the high point of the 75~80 0dd years they have been made.
The Century is still Japans limo for the emporo so that may hold it in top spot over all.
Love the lot of them.