If you have spent any time at or around Tsukiji fish market you may have noticed large rectangular woven baskets in the hands of the regular shoppers, or strapped to the backs of scooters and bicycles ferrying the mornings catch back to numerous sushi bars and izakaya (pubs). The basket is so popular with these market-goers and has been in use for so long that it's widely referred to as the Tsukiji basket.