If Russia was truly worried about what you say, why don't they care that there is a missile defence system in Japan?.
They probably do care. Bu there are important differences. Japans missile silo's are thousands of miles from Moscow. This gives the Russian's ample warning of any approaching missiles. They may get to shoot them down, or deploy some other device, or get people in shelters,and of course, retaliation is possible.
Retaliation may not be possible where the attackers missiles are close to the target, IE , the relatively short distance from Poland to Moscow.
Russia declared war on Japan in 1945. This was a short lived thing as the war ended a few months later. Apart from this episode, there has been, as far as I know, no friction between the Japanese and the Russians. There is no long simmering animosity between the two nations.
The situation is different in the West. There has been friction between the USA/West and Russia for decades. Attempts by the USA/West to site missile silo's alongside Russia's borders can only increase tension. But it is not the USA/West who will be exposed to Russia's wrath. It is Poland, Ukraine, Georgia and any other countries in that region stupid enough to allow themselves to be seduced by the USA/West.
You're argument keeps assuming that these will be made offensive. Japan is about as close to Russia as Poland, just off the coast of Russia and it's Pacific naval bases. The logical difference is, Russia has no aggressive plans for Japan like they do in central Europe..
Of course the weapon systems will be upgraded ! The whole purpose of the exercise is to gain the upper hand. What bullies cant take in the field, they seek to take with subterfuge.
You are right, Japan is as close to Russia as Poland is. But Japan is not as close to Moscow as Poland is. Japan is 11 times furthe from Moscow.
You may be right. Perhaps Russia has aggressive plans for Europe. Perhaps also it only wishes security, and border resolution in its ex states. Its too early to know right now.
As I said before, the US has no reason to put offensive missiles near Russia. If the US wanted to act offensively toward Russia, subs and ICBMs could hit anything anywhere.
And the Russians would retaliate with an equally devastating strike, which is why it wont happen.
The USA/West are safer toying with Russia from afar as they are now doing. I just don?t see why Poland, Georgia and the Ukraine are playing along. It's not as if the USA/West will come to their aid when push comes to shove.
Perhaps they really want to join NATO, or the EEC and complying with cohersion from the USA/West seems the best route. I have an unsettling feeling it is somethin they will regret