Overview
From Paula Curtis Collection[1]: This electronic exhibition consists of the following two parts: Part 1 provides simple and straightforward explanations on the history of Wasan (Japanese mathematics), a genealogy of Wasan scholars represented by Seki Takakazu, etc., as well as the posts “Column” to deepen your understanding of mathematics in conjunction with such explanations. In Part 2, the “Wasan Reference Library” posts the full-text images of major reference materials related to Wasan housed by our Library in conjunction with their bibliographical introduction.
The mathematics that developed in Japan before the Edo period, independently from the Western mathematics, is called Wasan. Western mathematics has been taught in school education since the Meiji era, causing Wasan, the indigenous mathematics of Japan, to fade from the limelight. However, Wasan was an excellent academic discipline and in no way inferior to its Western counterpart.
Wasan addressed various mathematical problems from introductory problems such as nezumizan (geometric progression) and tsurukamezan (a method of calculation based on determining the number of cranes and tortoises from the total number of their legs) to advanced problems relating to algebra and geometry, including simultaneous equations, Pi (the ratio of the circumference of a circle to its diameter), and trigonometric functions. As it also dealt with many practical problems, it was regarded as knowledge directly useful for the lives of people in agriculture or forestry, fishery, commerce, etc., and came to spread not only to the samurai class but also to the common people. It would not be an exaggeration to say that Wasan played a really significant role in contributing to the development of Japanese society in the Edo period.
- Institution/Author: National Diet Library
- Period: Premodern
- Geographic Focus: Japan
- Access: Open Access
Digital Humanities Resources on East Asia by Dr. Paula R. Curtis ↩︎