How did Chinese mathematics spread to Japan, Korea, and Vietnam?

The spread of Chinese mathematics to Japan, Korea, and Vietnam was facilitated by the shared adoption of the Chinese writing system and cultural institutions, which allowed scholarly texts to circulate throughout the region. Because these nations utilized Chinese characters, it is often more accurate to describe this tradition as "mathematics in Chinese characters" rather than strictly "Chinese mathematics".1

In the case of Japan, the transmission of mathematical knowledge began as early as the 7th century, often arriving indirectly through Korea. Key foundational texts, such as the Ten Classics of Mathematics, were introduced alongside tools like counting rods. Later, during the 16th and 17th centuries, additional works—including the abacus and treatises by authors such as Zhu Shijie—were imported, significantly influencing the development of Japanese algebraic methods.2

While historical records confirm that scholars in Korea and Vietnam also relied on these Chinese sources, the extent of original mathematical advancements within those specific regions and their subsequent influence on China remains a subject of ongoing scholarly research.1