Origin of otaku: The term otaku originated in Japan. It originally refers to someone who is obsessed with his own interests, does not care about the world, does not interact with others, and does not pay attention to anything else except his own interests. (Including personal hygiene, interpersonal communication, basic income to maintain life, etc.). That is, people who are not of the same kind as me and do not interact with and who do not pay attention to the quality of life, such as train nerds, construction nerds, military nerds, animation nerds, etc. A derogatory term that gives others the impression of being paranoid and perverted. Later, as the ACG group, that is, anime nerds, continued to expand, this title became known to the public. However, the status of this group of people was the same as before, it just had an additional title that was ridiculed.