Soroban Dojo

Train mental math with the Japanese soroban, quick lessons and motivating challenges.

Learn soroban, the Japanese abacus, and train your mental math with short, progressive and motivating exercises.

Soroban Dojo turns arithmetic practice into a daily training loop: guided lessons, timed drills, level progression and duels to stay engaged.

Features: • Step-by-step lessons to understand beads and columns • Mental math exercises adapted to your level • Training mode to improve every day • Duels and challenges to test your speed • Progression inspired by the Kyū/Dan system • Clean, fast and distraction-free interface

Ideal for learning soroban basics, improving concentration and making mental calculation feel more natural.