In an escalating diplomatic issue, Russia has called in the Japanese ambassador for a formal protest. The specific circumstances surrounding the protest remain unclear from the headline, but it involves both countries' diplomatic relations. The nature of the protest, its significance, and its potential impact on Russo-Japanese ties will likely be the focal points of the story.

In Japan, the diplomatic relationship with Russia is a critical topic due to ongoing territorial disputes over the Kuril Islands, historical factors, and regional security considerations. Public sentiment is often torn between desiring amicable relations and defending national interests.

In the US or EU, a country's ambassador being summoned is likewise taken seriously, as it typically signifies a grave issue in diplomatic ties. The matter is treated with care and sensitivity, considering the potential broad impacts on international relations and domestic politics.