If you haven’t yet had the opportunity to plunge into this fairly unique Isekai series, Yen Press, the publishers of Uncle From Another World’s manga, has provided an official description:
“Takafumi’s uncle went into a coma seventeen years ago, yet he has risen from the dead. Takafumi soon finds two strange things: his uncle loves video games more than anything else, and while unconscious, he was really moved to another realm as some heroic protector! Takafumi now not only has to share a room with a magical uncle, but he also has to catch up on two decades of history—smartphones, high-speed internet, current anime tropes…and the devastating end of the ’90s console war!”