In December 2007, University Press of Mississippi will publish a book titled Akira Kurosawa: Interviews. The 224-page book, available both in hard cover and paperback, will be made available as part of UPM’s Conversations with Filmmakers series, which already has a number of interesting volumes, including those for directors like Andrei Tarkovsky, Charlie Chaplin, Fritz Lang, Martin Scorsese, Peter Greenaway, Stanley Kubrick, Terry Gilliam, and many others.
I do not yet know the exact contents of the Kurosawa volume, but have inquired about the matter, and will update you with more information as soon as I get it. To the best of my knowledge (and here I may be wrong), the initial pressing will be 2000 copies, which I suppose will be plenty.
For Akira Kurosawa books, see the section on Kurosawa books.