Kinokuniya, the large bookstore chain, apparently has bought 90,000 copies of the 100,000-copy first print run of the collection. They plan to sell about half the books in their bookstores and distribute the rest to other bookstores, leaving few to be sold online. Kinokuniya is taking a risk, since under the current agreement it will not be able to return unsold copies to the publisher. However, given that the author is Murakami Haruki, they are probably not too concerned about possible losses.
You can read more about this story on the Japan Times page (in English) here or on the Mainichi Shinbun page here, or watch a video (in Japanese) here or here.
Some essays in the collection have been previously published in Shibata Motoyuki's literary magazine, Monkey, but the book also includes "150 pages" of new material. Here is the table of contents copied from the page of the publisher, Switch.
I have just looked through my issues of Monkey and found the first six essays, which would mean that the remaining six are new, unless I am mistaken.
On the publisher's page, we also we find the following promise:
Which in free translation means:
"It contains all the topics that Haruki Murakami, the unique, universally loved writer, thinks about. This long-awaited essay collection, full of autobiographical episodes, has finally been published!"
As it is a book of essays, and not a novel, this collection will probably not cause a translation-rights-buying frenzy, but I am sure it will be published in many languages.