denotes a distinct kind of mathematics which was developed in Japan

Japan

Japan is an island nation in East Asia. Located in the Pacific Ocean, it lies to the east of the Sea of Japan, China, North Korea, South Korea and Russia, stretching from the Sea of Okhotsk in the north to the East China Sea and Taiwan in the south...

 during the Edo Period

Edo period

The , or , is a division of Japanese history which was ruled by the shoguns of the Tokugawa family, running from 1603 to 1868. The political entity of this period was the Tokugawa shogunate....

 (1603–1867). The term wasan, from wa ("Japan") and san ("calculation"), was coined in the 1870s and employed to distinguish native Japanese mathematics theory from Western mathematics (洋算 yōsan).

In the history of mathematics

History of mathematics

The area of study known as the history of mathematics is primarily an investigation into the origin of discoveries in mathematics and, to a lesser extent, an investigation into the mathematical methods and notation of the past....

, the development of wasan falls outside the Western realms of people, propositions and alternate solutions.