From the Guardian:

Nothing had been revealed but the mysterious title, Colourless Tsukuru Tazaki and His Years of Pilgrimage, but that didn't stop hundreds of Haruki Murakami devotees queuing at midnight outside Tokyo bookshops last night to get their hands on the cult novelist's latest title.

...

With the publisher Bungeishunjū adding another 100,000 copies within hours of its release to an initial print run of 500,000, according to Reuters, Colourless Tsukuru Tazaki is set to top charts in Japan. It is already sitting at number one on Amazon.co.jp's bestseller list.

Besides Rowling and Meyer, it's impossible for me to think of any Western authors who would command such devotion. And this isn't part of an ongoing series whose fans are eager to discover what happens in the latest installment; it's just the latest novel by a writer they really like. Pretty amazing.