I was out in the Solomon islands a few years ago and a cache of mustard gas bombs were uncovered on one of the islands. I do not know whether they originated from Japan or the USA but the Americans sent out a bomb diposal team to neutralize them.
There were about fifteen personnel and they arrived in a C5 Galaxy. It got stuck on the small international apron and they had to send a Starlifter out with a tow truck so that it could be moved off.