Yesterday I decided to do a new batch of Suminagashi papers. Suminagashi marbling is a much gentler and more subtle style of marbling compared with the Turkish Ebru marbling that I do. Both styles have their own beauty - both in technique and results. There's a good website here, suminagashi.com, with a brief history and introduction to the art of Suminagashi. Also, there is one book that you might be able to get, by Anne Chambers, called Suminagashi: The Japanese Art of Marbling.
Suminagashi began in Japan by the 12th Century and is the first known marbling technique. The Turkish method, using paint, emerged a few hundred years later.