China and Japan’s worst diplomatic crisis since 2005 is putting at risk a trade relationship that’s tripled in the past decade to more than $340 billion. Toyota Motor Corp. (7203), Honda Motor Co. (7267) and Nissan Motor Co. halted production at some plants while Panasonic Corp. (6752) reported damage to its operations in China as thousands marched in more than a dozen cities on Sept. 16. Shares of automakers fell in Tokyo after protesters called for boycotts of Japanese goods and in some instances smashed store fronts and cars after Japan last week said it will purchase islands claimed by both countries. Tensions ... (full story)