It's pretty strange what noone here, except one man who proposed the idea about Solovetsky Islands - don't thought about Russia and the theme of the United States also mainly avoid. Really I see lot's of reasons why Russia together with a USA can save more people, then everywhere in the World. Of course if will be work together after a collapce of the civilisation. However Russia and USA can survive alone too.
And it's very strange to see the anything like that:
I am quite embarassed that I missed the possibility that Sakhalin could become a breadbasket for Japan. Because Sakhalin can provide between 7000 and 15000 km2 of land which is suitable for agriculture(at least if I didn't mess up with the maps). And depending on how much grain can be harvested from this land Sakhalin could become quite an important pillar of Japans food supply(the only number I have for how much can be harvested per area is for wheat in germany with 8t/ha or 800t/km2 in 2012 which would result in a harvest of between 5600000t and 12000000t for Sakhalin). But I still doubt that Japan would go because of the oil, but it would be an added benefit of taking Sakhalin. Also I don't think Japan would conquer Sakhalin because it would be more efficient to 'ask' the people of Sakhalin to join something like a trade union. But all of this depends on that Sakhalin is free from the rash.
Sounds like all Russian military bases on Sakhalin and Kurilian islands is abandoned although these places are much more lonely and rarely visited than Iceland, but have a military bases and ways how to defend from the epidemy. And looks like Russian can save the technologies of the old world.
Ok, why the Russian can do that?
Firstly, the Russia is a really big country. We have lots of towns surrounded by absolutly wild lands, mainly in the area of Siberia. For example -
First, second, third. All that towns is pretty big and have very small air traffic with another world. And we have in few times more small towns and villages in that region. I think people here can avoid the first wave of a epidemy. Of course, they can't survive during the long time without food supply and also can't avoid the infection during the long time, but people can survive at least first few mount. That towns usually have a warehouses with resources for half part of year or near and maybe have a military warehouses for case of nuclear war near. Food, fuel, weapons. And rivers.
If Russian government block the traffic on Trans-Siberian railroad and ban the Air-traffic when epidemy will be started - it's probably can give a few days for megacities in the center of Siberia like a Novosibirsk or remote satellites. If not - Russia still have lots of remote towns with 50,000 citizen or near and still have a closed military town and bases with a pass control. For example -
Lesnoy. That town is remote from civilisation, has armed guards, own populations mainly is a nuclear physicists and other scientists, also that town have factory for the manufacture of nuclear fuel and appropriate safety security. And we have same towns for a biological or chemical research. I'm sure what small part from this towns can avoid the Death and I'm totally sure what lot's of remote and lonely places in Russia exactly can avoid the epidemy some time, like a weeks of mounts.
Maybe some towns will be exist in isolation for many years, especially towns in Urals and Altai mountains, where people can grow some food and get enough weapons for defense from warehouses.
Secondly, Russia still have lots of nuclear submarines with crews and nuclear ice-breaker. Ice-breaker usually can carry tourists or passengers and accompany transport ships in a Arctic Ocean. Also on the coast of the Arctic Ocean and the island we also have some military bases, airfields and other objects, where people can survive some time.
In the one dark day the nuclear ice-breaker and that military bases will be out of a food but... We have three amazing place, where all Russian ships and people can have the haven.
First place is a Petropavlovsk-Kamchatsky, the main base of a Russian Navy in the Pacific sea. Of course it's a continental town, but exist no way how to walk through the hills and volcanoes of Kamchatka and that town have only air and sea communications with a civilisation. And that troubles is a reason why that town is not popular as international port. I think what that town can be saved from epidemy for a long time and be a real technological and supply base for a Russian navy.
Second place is a Sakhalin and Kuril islands. That island also is not popular but have a port, towns and military bases with airfields.
And the third place is the territory of the United States or Japany of Pacific Oceans islands, like Midway Island, Hawaii or Anchorage. The presence of nuclear submarines is a reason why masters of that ports will be not shot in the Russian envoys as it happend near Iceland.
Thirdly, Russians military have a really good way how be sure what all people on the ice-breaker or another ships - as on their military ships too - is free from a rash. Quarantined for a month or two and if anyone try avoid the quarantine Russian military can use the airforce, onshore anti-ship missiles, warships and submarines as apparent reason to comply the quarantine.
And the Russian able to just clean up the one of two islands in Kuril archipelago from infected people (thermobaric weapons) and use that lands as a quarantine zone for a people from a transport jets. And we can evacuate survivors from the lonely Siberian towns on that islands, because Russian also have very good military transport aviation.
Fourth, the cooperation with a ships from other countries, especially with US Navy, allow to keep under control main part of Pacific Sea and protect as many islands as it's possible. And use that islands too. I'm sure what the Russian and US admirals will be enough smart for realise what both side have a nuclear weapons and can eliminate each other and it's be better if they will be support. I'm sure what US and Russian people can clear the Hawaii in a few months (if Hawaii will be infected) and evacuate as many people and another stuff as it's possible.
So, Russia have few safety places, lot's of places where people can survive some time before evacuate, way how to evacuate survivers, places for a quarantine, way how to clear up the infested island (thermobaric weapons and heroic sacrifice from soldiers and officers), way how to defend own territories from another military, and ways how to save a techology specialists, agriculture and industry on a Sakhalin and some another zones.
Of course, this is ideal way how it can be. But I'm sure what something from that can happend and we can have anything like a Union of the Pacific Ocean. And survived towns and villages on continent of course, don't forget about Solovets islands.