Short answers, pulled from the story.
Otaku is a Japanese second-person pronoun meaning "you" or "your home", historically associated with polite, formal speech. It was adopted among anime and manga fans in the 1970s and early 1980s as a way to address strangers at conventions from an impersonal distance. In 1983, essayist Akio Nakamori repurposed it as a pejorative for obsessive fans in the magazine Manga Burikko, giving it its modern slang meaning.
Tsutomu Miyazaki, dubbed the "Otaku Murderer", was arrested in 1989 after kidnapping and murdering four young girls. Police found 5,763 videotapes in his home, some containing anime and slasher films mixed with footage of his victims. The intense media coverage of his collection fused the image of otaku fandom with criminality, causing severe social stigma that persisted through much of the 1990s.
The 2005 Nomura Research Institute study estimated the economic impact of broadly defined otaku culture at as high as 2 trillion yen. The manga segment alone was estimated at 83 billion yen with a population of 350,000. The Hamagin Research Institute separately estimated moe-related content at 88.8 billion yen, or approximately 807 million dollars, in the same year.
A 2013 Japanese study surveying 137,734 teenagers found that 42.2% self-identified as a type of otaku. This figure reflects a dramatic shift from the intense social stigma the label carried following the 1989 Miyazaki case.
Western exposure to otaku culture began with the anime Gunbuster, which was officially released in English in March 1990 and whose protagonist is teased for her otaku behavior. The term spread further through the Usenet group rec.arts.anime and via William Gibson's 1996 novel Idoru. A 2022 Dentsu survey extrapolated that approximately 15 million American Gen-Zers, around 34%, identify as anime otaku.
Cultural critic Eiji Otsuka coined "narrative consumption" in the late 1980s to describe how early otaku collected fragmented products to reconstruct a hidden grand narrative behind them. Philosopher Hiroki Azuma argued in his 2001 book Otaku: Japan's Database Animals that modern otaku instead practice "database consumption", breaking media into discrete emotional and visual traits called moe elements and assembling combinations from a vast cultural database rather than engaging with an overarching story.