ロケットストーブ... interesting stove top, warmer and griddle combination.
Bullerjan stove. As the article states, not available in the U.S. /The design is very clever; tubes wrap around the cylindrical combustion chamber, creating a stack effect. They are going to suck in a lot of cold air from the floor and push it out the top, with no moving parts at all. It is missing a flat deck on top that a lot of people use to boil water, but it is going to pump out a lot of heat.
Contemporary wooden public bench ROUGH&READY: TOPSEATS Streetlife