As anti-Japanese sentiment has steamed up in China over the past month, Japan's embassy and consulates there have issued several warnings urging citizens to exercise caution when out in public. On Thursday, the consulate in Shanghai released another advisory, but this time including six accounts of Japanese residents harassed by locals.

The consulate indicates the incidents may have been in reaction to the ongoing territorial dispute, as well as to reports that three intoxicated Japanese residents stabbed a Chinese woman that...