Kamchatka

A video of his speech to teenagers in Kaliningrad quickly spread on social networks.
Putin held on to a chair, his legs constantly twitching during the speech he gave to teenagers, Newsweek reported.
The public gives him various diagnoses based on videos of him looking bad and behaving strangely or based on unconfirmed rumors about his health, which the Kremlin denies.

As they say, that is the last, but still possible option, because the relations between the two countries have worsened since Japan got a new prime minister.
The article states that Russia could use the new "Sarmat" combat system in the conflict, which is known in the West as "Satan 2".