A book explaining a new algorithm-based method for learning soroban (Japanese abacus). "How to Learn Soroban" edited by the Toyo Soroban Association. 6th edition, Showa 16 (1941). The cover has yellowing, scuffing, and some tears. The main body has yellowing and scattered spots on the edges and pages, but there are no markings and not much sign of use. The first edition was published in Showa 14 (1939). I believe this is a valuable soroban instruction book published before the war. - Title: How to Learn Soroban - Publisher: Tokyo Okamura Bookstore - Author: Edited by Toyo Soroban Association Thank you for viewing.