Otaku, which means "your house" in Japanese, was a term used to (snidely) describe people with obsessive hobbies. To wit: An otaku was seen as a shut-in.
원문출처 : https://www.cnn.com/travel/article/tokyo-geek-guide/index.html
원문출처 : https://www.cnn.com/travel/article/tokyo-geek-guide/index.html