An unidentified Russian fighter jet was reported to have made an unauthorized visit into Estonian airspace. On an undisclosed date, the aircraft was noted to have crossed the border without prior notification. Estonia considered it as a violation of its sovereignty and registered its protest with the Russian authorities. Japan, sharing a historical contention over territories with Russia, has expressed its concerns over breach of international norms.

In Japan, national security, international law observance, and territorial integrity are among the issues that the public perceive seriously. This news naturally arises interest, as it relates to Russian military activity and possible territorial violations, closely mirroring Japan's own disputes with Russia over the Kuril Islands.

Violations of airspace are generally viewed seriously in both the U.S. and EU and would usually elicit formal diplomatic responses. Just like Japan, these violations are seen as breaches of national security and sovereignty, sometimes resulting in escalation of sanctions or military tensions.