This is a Hokusei rice cooker. It's a Bunka Nabe (culture pot). 18cm It's unused, but it's been stored for a long time at a hardware store. There are stains and scratches. It can also be used as a steamer. From the description: A new rice cooker Calorie pot ◆ With standard markings ◆ Doesn't boil over ◆ Durable pressure plate ◆ Stays beautiful forever ◆ Can be used for delicious cooking besides rice The back of the description has instructions on how to cook rice. Instant purchase OK.