Ahead of the anniversary of the Nanjing Massacre, Japan issues a safety advisory in China.

Ahead of next week’s anniversary of “the Nanjing Incident”—also known as the Nanjing Massacre—the Japanese embassy in Chinachina issued a safety caution on Friday, stating that the event is particularly delicate.

Since Japanese Prime Minister Sanae Takaichi warned parliament last month that a hypothetical Chinese attack on democratically controlled Taiwan would result in a military reaction from Tokyo, tensions have increased.

“Anti-Japanese sentiment tends to rise on days related to historical issues between Japan and China, and special caution is required in light of recent local reporting on Japan-China relations,” the embassy stated in a statement.

The 1937 mass killings in Nanjing by invading Japanese troops have long been a flashpoint in China-Japan relations.

The advisory urged citizens to pay close attention to their surroundings and make every possible effort to ensure their safety when outside.

In particular, the embassy asked people to refrain from speaking loudly in public and avoid wearing clothing or carrying items that would make it obvious they were Japanese.