Tomoe Soroban Co., Ltd. is a Japanese abacus manufacturer founded in 1920. With a century of experience, the company makes and sells sorobans while researching how they can support learning and care settings. Its work builds on the Japanese four-bead abacus and extends the possibilities of both traditional sorobans and the 100-bead abacus for learners around the world.

The company offers abacuses for young children, school-age students, teachers, special education, and older adults, alongside teaching aids, educational toys, books, and other products. Examples include wooden 13-digit abacuses, 100-bead abacus and workbook sets, and Jamaica, a calculation game. Tomoe also provides educational resources and services, including workshops, abacus classes and certification information, flash mental-arithmetic activities, teacher training, immersion programs, and programs using abacuses in care settings. Its approach emphasizes hands-on learning: moving beads and speaking numbers aloud can help children explore numerical concepts, while specially developed larger abacuses and practical materials support engaging activities for older adults.