I live in Sapporo, but I spend the winters in Tokyo. I've heard that the air quality in Tokyo isn't great, so I use an AirDog and a Panasonic air purifier in my small room. I also bought a Levoit, but I didn't have space to put it in my 6-tatami mat living room. I used it for about 3 hours, then cleaned the room with a vacuum and put it back in the box. I bought it about six months ago. Tokyo has a lot of greenery along the Shakujii River, and the air was surprisingly clean. So, I think the AirDog and the other air purifier I have are sufficient, and I'm putting this up for sale. Levoit Core Mini air purifier, white, compact and stylish. - Brand: Levoit - Model Name: Core Mini - Model: LAP-C161-WJP - Suitable room size: 12 tatami mats - Accessories: Box, instruction manual - Color: White - Design: Cylindrical, mesh bottom Thank you for looking.