During the Edo Period (1603-1868), the Japanese made very sophisticated Western style clocks that kept time according to the lunar calendar. However, in 1872, Japan switched to the solar-based system, rendering all their clocks obsolete. So they went back to the drawing board. During the twentieth century, they made great progress in a highly competitive industry. Today, Japan's clocks and watches are amongst the best in the world. Generally, watches made in Japan have the stamp "Japan Movement" on its casing. See "Japanese clock". Wikipedia. Retrieved 2014-11-01.