Some more examples
here.
I'm hunting for pictures where I can make out the Japanese text as well. There seems to be an industry default layout for mahjong/hanafuda panels, so best to adhere to that layout.
The largest pic I could find is this one. From left to right, the lower row reads: KOIN (coin), SUTA-TO (start), [hard to read, but I think it says] ?? BUROKKU (? block), [skipping next one, can't read], KAN, PON, CHI- (chi), RI-CHI (reach), RON.
Some panels have some additional buttons for betting. Would be best to include those as well.
