In spite of the somewhat authoritative tone of the subject-title I can only really spill the soykaf due to my lack of knowledge.
What I want to ask is, what are the possibilities for a continuation of otaku culture and activity, e.g. doujinshi sokubaikai like comiket, after a societal collapse? Obviously access to things like paper and printing would be more difficult, but are there other, more sustainable technologies that would enable otaku media production and sharing? Is otaku anarchism possible, or is moe's existence dependent on industrial society? I would like to believe the former. Please post your thoughts.

to answer affirmative to the viability of otaku media post collapse is like my whole denpa university phd thesis.
paper production via flax/hemp growth. ink production using lampblack as a minimum, mass printing using wood block, etc.
and this of course is without the community efforts toward rebooting some key technologies which will happen in various places. spin down of high power computer devices to lower power salvageable ones while solar and battery reserves persist, transcribing most important information into text based long term formats, printing hard copies of as close to everything else as possible.

otaku media can survive post collapse. but realistically only in pockets which may have a difficult time spreading outward. sneakernet will be able to carry text data over long distances between pocket communities with collapse os like infrastructure, but communities will need to view maintaining art going forward as important, and will need someone with the artistic skill to embedded otaku media moving forward. learning to draw decently now is probably pretty important if collapse is inevitable, there will be many much more short term important things if/when shtf happens.

Maybe but only in a few locations in Japan. Maybe a few places in China? Not worldwide. Maybe we could have some separated off shoots of otaku culture but they would soon dissipate. The remaining paper would probably be used by rich people, religious groups and accountants. Without industrial publishing... I doubt the Internet would be there either so things would look pretty grim for otaku culture in particular.

>>3
if you want otaku media to survive in your post collapse bubble you have to be the seed that sprouts there. you can't rely on anyone else to ensure it's survival.

otaku culture would be more fun because everything will be rare