What happened (notification, protest, and completion claim)

Japan protested Russia’s notification that Moscow would conduct missile tests over the disputed Kuril islands. Japan’s protest targeted the planned missile testing in the disputed area.

Russia’s Pacific Fleet stated that the missile test had already been conducted. The publicly available information did not clarify the exact timing of that completion claim.

Background and earlier position (Kuril islands dispute context)

The Kuril islands dispute between Japan and Russia is the key background. Competing sovereignty claims over the islands keep the region diplomatically and militarily sensitive.

What changed now (from planned tests to a completion claim)