Tập 26: Black Jack nhớ lại một ca phẫu thuật trong quá khứ cho một cậu bé bị liệt tay, người đã sử dụng bàn tính.

26

While hearing Pinoko talk about the abacus, Black Jack remembers when the teacher and father of Eiji, a boy, came to see him a long time before. Eiji dreamed of being an abacus champion, but he couldn't move his hands. Black Jack operated to fix them, but when his hands cramp up in a competition, reverts to using the abacus with his tongue. (Source: Wikipedia)