Tokyo stock prices have tumbled amid fears about the economic fallout from China's intensifying diplomatic and street protests targeting Japan as bilateral relations sour to their worst state in decades.
Analysts say Japanese companies, many of which are counting on China's booming economy to drive profits, aren't taking the anti-Japan sentiment and unrest seriously enough -- a concern investors appear to share. The benchmark Nikkei average plunged 3.8 percent Monday to end at its lowest point since Dec. 16.
Some of the most noticeable declines were in companies with business in or tied to the Chinese and U.S. markets.