This oriental/asian hat is a kind of rice paddy/coolie hat, however they normally go to a point on the top, so I guess this is more like the Japanese Kasa Hat.
Made overly large, the word kasa can also mean umbrella.
Also this is not made of straw but bamboo.
Also this is not made of straw but bamboo.
This hat was purchased at Larp fair, but I've seen its twin for sale on ebay
Straw hats = Any type of hat made of straw or bamboo