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 includes solutions. Bundling is welcome! You might save on shipping. If you're not good at mental addition (mental addition hospital), or if you need mock exam questions, check here: #Soronyan Soroban Materials ← You can see all the soroban materials here. Books are not subject to price reduction (due to copyright law). It will be shipped via anonymous delivery, using the "Nekopos" service. 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