Soroban Abacus is the traditional Japanese model of Abacus used for performing basic arithmetic operations. Apart from this model, a Chinese version of Abacus was used in ancient times which was called as Saunpan Abacus. The Suanpan is a horizontally structured Abacus that has 2 blocks. The upper block constitutes 2 beads and lower block constitutes 5 beads in each rod.
Soroban is a horizontally structured Abacus that has 2 blocks. The upper block constitute of only 1 bead and lower block constitutes of 4 beads in each rod. The red color movable buttons are called beads and the movement of these beads represent numbers.