Israel Defense forces do use the Jericho 941 [USA's Baby Eagle series], but they also use Glocks, Sigs, and Rugers. The Isreali Military Industries make the Jericho, so it is a Israeli product, like the Uzi or Galil firearms they also use. Whether it is a token few to support a national industry or not, I can't say.
As for Japan, you are right: constitutionally they cannot have an army. Instead, they have a 'Japanese Defense Force' that is organized to protect Japan from X. They use F-14 and f-15 jets, but they are only a 'defense force', not an air force or army. Yeah. Right. I know that quite a few groups that claim to just be 'police forces' would LOVE to have f-14s and f-15s to use.
Now, this could have changed in the recent past and I am unaware of it. After all, Germany had a constitutional amendment that did not allow them to send airplanes outside of their own borders until the balkan crisis at the end of last century, when they made an amendment to allow their Luftwaffe to serve as part of a UN force.
I can't add to what any other country uses, as I really don't know too much. I just know about the Jericho/Baby Eagle from research before I bought mine.
good luck
jason