A stereotype (fixed idea) is a rigid, ingrained belief that binds one's thinking and won't leave the head. It refers to a stubborn state where one refuses to change their opinion even when circumstances change, and is mostly used in a negative sense. Note that the common Japanese term "kotei gainen" is considered a dictionary error; the correct term is "kotei kannen." Characteristics/Meaning: An obsessive, subjective assumption. Feature: Not changing one's mind despite changes in surroundings. Similar words: Preconception, prejudice. Specific Examples and Roles: "Curry must be brown." "Men work, women stay home." Positive side: Can be useful for prediction, like "The sky is dark so it will rain, I'll take an umbrella." Negative side: Gets in the way of new ideas, makes one stop listening to others. 1. Gender/Family "Men work, women stay home": Fixed roles by gender. "Mothers should prioritize childcare above all": Excessive demand for self-sacrifice from mothers. "Men shouldn't show weakness": Restriction of emotional expression. "Marrying and having children is normal happiness": Denial of diverse lifestyles. 2. Work/Business "Going to the office at the same time every day is correct": Resistance to remote work or flexible styles. "People who work long hours are superior and dedicated": Valuing hours over results. "Young people's opinions lack experience": Excluding ideas based on age or career. "Once you join a company, you should stay until retirement": Prejudice against job changes. 3. Age/Generation "Elderly people can't use digital devices": Assumptions ignoring individual proficiency. "Young people these days are fragile": Lumping personalities together by generation. "At this age, you should naturally be able to do this": Binding skills or behavior to age. 4. Nationality/Culture "All Japanese people are serious and bad at self-assertion": Personality stereotypes by nationality. "All foreigners can speak English": Ignoring native languages and backgrounds. "Foreign products have sloppy quality": Evaluation based on past images or prejudice. 5. Daily Life/Education "Getting into a good university guarantees the future": Narrowing options due to academic elitism. "Humanities majors are emotional, Science majors are cold": Personality assumptions by major. "If you don't eat three square meals, it's bad for your health": Ignoring individual constitution or life rhythm. This is also just a concept. I'm not talking.