A black plastic, 15 rod soroban/abacus with brown beads, rests on a laser printer copy of “Japanese Abacus: Its Use and Theory” by Takashi Kojima (Charles E. Tuttle Company, 1954).

I taught myself how to use a Japanese #abacus, the #soroban. It took 9 1/2 hrs to be fairly competent at adding & subtracting. After watching YouTube videos, I am ready to read the book by #TakashiKojima. It’s a classic.

By Takashi Kojima!

{ #onepiece #luffy #takashikojima }