It's barely even "niche," but the inside history of Japanese video games from 1980-1995 is really tough to find information on, aside from the mega-luminaries like the Shigeru Miyamotos of the world.

It's unclear how much of this is due to language barrier; maybe there's tons of interviews with those early Japanese game industry types on the Japanese net.

John Szczepaniak is one of the few people digging up this history and doing his own interviews with primary sources. He's really done a loooooot, e.g.

https://www.amazon.com/Untold-History-Japanese-Game-Develope...