[worthless-trash]

I mean, the mitsubishi logo, makes it pretty obvious who the donor is.

Edit: i mean, we can't possibly figure out who donated, thank you kind donor.

[jogu]

Mitsubishi Group has a lot of companies, including a bank, so no the logo doesn't say anything about who donated it.

[Hamuko]

Doesn’t that just mean that they’ve been manufactured by Mitsubishi Materials Corporation?

https://en.wikipedia.org/wiki/Mitsubishi_Materials

[worthless-trash]

And I imagine they could trivially track them, like most modern gold bars sold/collected in this volume.