OK, I got curious about the Awa Maru, because after all, we did sink a Red Cross ship, and this was one of the the few reasonable claims Imperial Japan made during this timeframe.
They wanted restitution for all damages, while we offered to replace the ship only. Several years after the war, we signed an agreement with them that in view of the help we gave them after the war, the claim would be considered settled, and we expressed our regret for the sinking and loss of life.
Seems like a fitting resolution.