If you have been to any Japanese home in winter, you may have noticed the nasty smell once you stepped in. Compared with other countries, Japanese people prefer kerosene heater to electric/ radiation type.
Why kerosene heater?
I was in a little chat with Komori sensei小森先生 [the teacher sitting in front of me] today. She said that because electricity is quite expensive in Japan so the bill can go way high if you use electric heater, kerosene heater is the mainstream. Yet, it still costs you at least 2000 yen for the fuel each month!