Japanese Occupation 4 Annas - Myanmar

Hello, 

Recently I've gotten into adding coins to the catalog and added a few coins from Myanmar. While I was doing so, I came across this piece allegedly struck during the time of the Japanese occupation. It is a “4 Anna” aluminum piece. I don't think it is genuinely a Japanese occupation coinage pattern (Aluminum, dates, the fact that is looks like a modern Thai or Burmese coin) and apparently some others agree. Just wanted to get others opinion on it and see if I should add it to the fantasy category. 

https://www.ebay.com/itm/126439642667

https://www.academia.edu/118448086/THE_MYSTERIOUS_FOUR_ANNA_ALUMINUM_COIN_OF_BURMA

https://currencies.fandom.com/wiki/Burmese_4_anna_coin

(Also is there any way to add a document to this message? )

From Krause:


 

SCWC 1901-,  46th edition, page 1600.

There are no images in the printed book, but Numismaster has images.

https://numismaster.com/MC_6574

I can only say I don't know any Japanese source talking about this one but patterns are rarely featured (foreign ones even less) anyway.
You probably have to ask a historical society or a government organ if official documents still exists or ever existed.