This is a practice problem book for the certification exam hosted by the Japan Soroban Federation and the Japan Chamber of Commerce and Industry. Published by Sato Publishing. It contains 15 sets of problems and solutions. Bundling is welcome! You might save on shipping. If you're not good at mental calculation (Mitori-zan Hospital), or if you need mock exam questions, check here: #Soronyan Soroban Materials ← You can see all the soroban materials here. No price reduction on books (due to copyright law, even when bundled, the price will not be below the list price). Shipping will be via anonymous Nekopos. Please read the profile carefully❗️carefully❗️carefully❗️ before purchasing without a comment if you have no questions or requests for bundling. Self-study Home study Right brain activation Anti-aging Dementia prevention Soroban certification practice problem book