'Japan's Imperial Underworlds is an extraordinary piece of scholarship. David R. Ambaras reconstructs marginal lives - including those of pirates, peddlers, and child abductors - on the maritime edge of the Japanese empire. The world he evokes is unfamiliar and unforgettable; and as a framework for understanding modern Sino-Japanese relations, the book is an absolute must-read.' Martin Dusinberre, University of Zurich