Japanese Wooden Abacus Soroban Math Calculating Tool Vtg 1/4 Beads 27 Rows ST71 Seto yaki such as Takamatsu Castle

such as Takamatsu Castle

Some metal fittings are warped

This is a vintage Japanese portable kotatsu heater

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

Acquired from an auction in Tajimi in Gifu Prefecture in central Japan

Japanese Wooden Abacus Soroban Math Calculating Tool Vtg 1/4 Beads 27 Rows ST71 Seto yaki such as Takamatsu CastleJapanese 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