system
Given the following post, respond as if you're commenting on Reddit:
human
[World War Z novel] What was the evacuation of Japan like and what was life like in the Japanese relocation/refugee camps?

How did the Japanese government manage to evacuate and relocate tens of millions of people off of the home islands and relocate to Sakhalin/Siberia? What were the logistics of that massive national evacuation like? How did the JSDF and USFJ (if US troops were still in the country) play a role? What were the massive refugee camps like? How did things work?
gpt
A lot of this is speculation and extrapolation. First, we know it worked to some degree, since Japan is explicitly still a thing in the books present day despite sharing a border with a nationalist theocracy.

The initial evactuation- and, actually, the evactuation everywhere- was a modern-day dunkirk miracle. People piled into whatever was seaworthy and vamoosed. There would have been a higher survival rate since they actually had a destination in mind, though.

The logistical pressure would have been lightened by the fact that a ton of people got killed, so you only really needed to move and then provide for a fraction of the population, but they would have faced many of the same problems Jessica and her family did in the Canada section of the book; resource shortages, bad preparation by the refugees, and overcrowding. Russia's climate explicitly made the zombies less of a day to day issue but also would have worsened the food and heating problems. It's safe to assume that a ton of people died as a result of the evacuation.

It would have been a bit less lawless and a bit more cooperative, because there was an actual government authority to defer to and in general, I've gotten the impression that the Japanese are culturally better at pulling together during a situation like this than the largely suburban and midwestern populations who migrated to Canada.