Japanese hat with sun flaps

I recently watched Letters from Iwo Jima, good movie but I wanted to find out what the name of the hat worn by Saigo and other lower ranking infantry. Its a felt looking cap with sun flaps covering the knech the man on the far left of this photo is wearing one.


If you could tell me what its called, or if you could tell me were I could buy one that would be great thanks!

 

Its a standard Japanese Army infantry fieldcap with havlock

 

thanks a lot!

 

There is also a Naval version I forgot to mention.