Japanese Wooden Abacus Soroban Math Calculating Tool Vtg 1/4 Beads 27 Rows ST71 Seto yaki Packed Weight: 610 grams

Packed Weight: 610 grams

This is a vintage Japanese portable kotatsu heater

Some metal fittings are warped

This is a three-piece set of vintage Japanese wooden lacquered drink saucers/coasters

Inscriptions on the body can include the name of the liquor store

Japanese Wooden Abacus Soroban Math Calculating Tool Vtg 1/4 Beads 27 Rows ST71 Seto yaki Packed Weight: 610 gramsJapanese Soroban Abacus Calculator Tool This is a vintage Japanese abacus or soroban. It is a mathematics calculating tool and is considered the first calculator in Japan. The Japanese abacus is different from the parent Chinese version. It has a top section of single beads and a bottom of stacked beads, usually five. At the center is one unmarked stack used for decimal places for more complicated calculations. Many primary schools all over Japan