Lange, FPJ are still big here. But Patek is also big. Dufour has made just one model and I can't say it is "hot" now - 130 out of 200, and one collector has 8 of them. It WAS big hit. They buy LEs, as a plus to their collections. If the regular models don't sell, the brands don't make LEs, right? But it is true that Japanese like LE models regardless of whether they already have the regular model. There are many who buys same model but different finish or color. Pam is big, Hublot is big, but ROO is not big. I think Japan is the only market where ROO doesn't sell as well as they want to. Japanese wrists are, well, small. I don't understand the popularity of PAM myself, so I can't comment on why PAM sells well here.
My 2 yen.
Ken