Delonghi oil heater = 36178 yen ($389.01 €289.42)
I bought a Delonghi oil heater for 36,178 yen ($389.01 €289.42) from amazon.co.jp.
It works with electricity, so heating power is not so high. It take one hour to warm up my room.
Someday I would like to set up a gas outlet in my room and use a gas heater.
If you want to know something about Tokyo, ask me it please.