With debates firing up across Japan on whether the pacifist postwar Constitution should be revised, books on the issue are selling strongly, prompting publishers to take advantage.

Law students preparing for the bar exam have traditionally been the principal buyers of books on the Constitution. Demand has grown, however, since debate on constitutional revision started gathering steam this spring.

Sales of Constitution-related publications at Sanseido Bookstore Ltd.'s flagship outlet in Tokyo's Chiyoda Ward rose 30 percent in May from a year ago.