Chinese Occupation Currency?

[killdead 660]

Hello, I have recently obtained this piece of Chinese currency from my grandmother, From what I can see, It is very old. The reason I think it is unique is because It is written in english, Most say that It is Chinese Occupation money from ww2. I thought we were fighting Japan in ww2 not China, Perhaps Indo-Chinese/Vietnamese? Any help on what this is or what the writing on it says would be appreciated.

[KC]

http://www.chinahistoryforum.com/index.php?/topic/29941-chinese-printed-money/?s=82d122e2853a91df98fb5a919cd17061