Print collection published by Asahi Printsha Contains 22 sets Problem book published by Sato Publishing Contains 15 sets It is effective to repeatedly practice the answers to the problem book by writing them in a notebook, and then practice writing in the print collection after applying for the certification test. The print collection will be lightly folded in half, with the problem book inserted, and shipped via anonymous Nekopos delivery. Due to copyright issues, the abacus materials are not discounted ❌. If you combine them with other products and save on shipping costs, the price may be reduced accordingly, but the materials will not be sold for less than the list price. If you are not good at mental calculation, please see below. #Soronyan Abacus Materials ← You can see all the abacus materials here. Please read the profile carefully❗️carefully❗️carefully❗️ and purchase without comments if you have no questions or need to combine items. Abacus certification practice problem book Brain training Anti-aging Right brain activation Home study Self-study