Mushiki or seiro (蒸籠, literally: steam-basket) are two different types of Japanese steamers.

Mushiki are round steamers made from bamboo like those used in Chinese cuisine

Chinese cuisine

Chinese cuisine is any of several styles originating in the regions of China, some of which have become highly popular in other parts of the world – from Asia to the Americas, Australia, Western Europe and Southern Africa...

. They can be stacked on top of each other so that the steam can cook many different servings simultaneously. Seiro are large rectangular steamers made traditionally from bamboo but nowadays also often from metal. Seiro can also be stacked.