In Japanese homes, it is not unusual for cooking smells to linger for a while in the kitchen or living room. After curry or yakiniku, for example, the smell may still be noticeable the next day. What people often care about more is keeping those smells from reaching the bedroom and getting into bedding, clothes, or freshly washed laundry. The goal is not necessarily to remove every trace of food smell, but to stop it from spreading too far through the home.
When cooking something with a strong smell, such as grilled fish or fried food, many people turn on the kitchen exhaust fan before they start cooking rather than waiting until smoke or odors appear. They may run it at a stronger setting from the beginning and leave it on for a while after the cooking is finished.
Whether people also open a window depends on the household. Some do, especially to improve airflow, but the exhaust fan is usually the main tool. The idea is to pull smells out from around the cooking area before they spread through the rest of the home.
Closing doors is another very common habit. Doors leading toward bedrooms, hallways, or rooms where clothes are kept may be shut before cooking begins. If laundry is drying indoors, it may also be moved to another room. People may notice smells on curtains or a sofa, but smells on bedding or clothes tend to be much more bothersome. Nobody wants to go to bed or leave the house still carrying the smell of dinner.
Air purifiers and deodorizing sprays are more a matter of personal preference. Some households use them, while others do not. A small amount of cooking smell remaining in the home is often accepted as something that simply comes with cooking.
So in a small Japanese home, controlling cooking smells is usually not about making the entire house completely odor-free. It is about turning on the exhaust fan early, closing doors, moving laundry when necessary, and keeping the fan running for a while after cooking. The aim is to keep the smell of cooking from reaching bedrooms, clothes, and bedding. A kitchen smelling like dinner is one thing. Wearing that same dinner smell the next morning is another.
