Do you think the war between Russia and Japan is possible again?

no doubt!
As you know, we have new taxes for used cars in Russia and now flow from Japan to Vladivostok decrease dramatically... Some months more and Japan will start war because they have no place to keep all used cars :)

I would think that the issue of the Kurils Islands is a more pressing problem to Japan than the exportation of USED cars to the Russian Far East.
Successive Japanese governments have lately pushed that issue at the forefront of their diplomacy with Russia.
It's an obstacle for Russia and Japan signing the peace treaty that would officially end WWII, but Japan is pragmatic and it hasn't affected the business relations between the 2 countries, YET!
Lately Japan has been more nationalistic than say 20 or 30 years ago, and is keen to recover the 4 islands. The loss of those affects Japan's prestige. An extreme-right government could egage in some hostility, starting with sending fishermen in the area to harass the Russians, and a conflict could escalade from that.

Yes. I think it wil come to it wen russia move in to the top of the ice wich is miwltig and it become and new empir
russia is showing ot the world it be comeing ne age empir.russis will get alski and candia some of the west usa coast
that is danger of the world if do not get it will not survive