Abroad notarization of innocence in U.S. immigration.

It doesn’t matter whether you mention it in advance or not. You can go and do it now.

I have done it. I forgot whether I went to the Japanese embassy with the notice from the embassy requesting a clean criminal record.

When you go to the Japanese Embassy, ??one of their jobs is to do this. I applied at the Japanese Consulate in Shanghai.

I regret it so much that I wish I had not written about this experience at all. The Americans don't care where you were during that time.