This is a complete three-volume edition of Kaizan Kinjū-shū Taisei (改算金玉集大成), a significant Edo-period wasan (Japanese mathematics) book, printed in Meiwa 3 (1766). The work follows in the tradition of Jinkōki and other early Japanese mathematical texts, offering detailed insights into arithmetic, abacus calculation, and problem-solving methods.
The book measures approximately 16 × 23 cm and contains 81 leaves. It shows signs of aging, including wormholes and wear consistent with long-term preservation. Despite these imperfections, it remains a valuable artifact of Edo-period mathematical scholarship.
