Sponsored by the Japan Chamber of Commerce and Industry Supported by the Japan Soroban Federation ・Japan Soroban Research Institute ・Edited by Chogoro Yamamoto Soroban Proficiency Test "Mental Calculation Practice Workbook" Level 2 A nostalgic Showa-era soroban workbook. Although it is unused, there may be some stains, yellowing, scratches, and folds due to aging. Please consider purchasing only if you understand this. #Soroban #Soroban #SorobanTest #SorobanWorkbook #ShowaRetro #SorobanTextbook