Well, its not celebrated as such, but that doesn't mean that people don't spend ridiculous amounts of money on stuff at a time of year that happens to coincide with Christmas.

Japan currently also has a growing "celebration" around Halloween as well. Essentially anything that can make money, will have some company promote it to drive that wheel

In the last two years, Disney and Universal studios Japan have been pushing Easter.

Most Japanese people have no idea what's behind Easter in any form. Just cute bunnies and chocolate eggs.