This is an interesting and important discussion. The ways that Japanese swords were treated - by the Japanese, by the US occupying forces, and by the the mass of individual Americans who saw them suitable souvenirs all deserve to be considered. And sure, Col. Cadwell was important - which is why his bronze bust is there in the Musuem. But other responsible Japanese were actively trying to make their occupiers aware of the importance and interest if Japanese. In 1947 - when people were hungry and unhoused, Inami Hakusui and Honma Junji produced english language books seeking to educate GI's about swords. All of that deserves attention. Not to mention John Yumoto.
But we shouldn't ignore or overlook the efforts of Japanese folks to get back swords that had been taken from their country after the War.
A few serious Japanese individuals came to America to buy swords in the early 1960s, but they had limited success. Takahashi Nobuhide-sama, a gentleman and an artist, told me that he had gone to California looking for swords, but decided that they had all been destroyed becasue he couldn't find any. Remember, too, that Ogawa Morihiro first showed up in America -- at the Chicago Sword Show!.
As swords moved from garage sales and gun shows, there were some serious attempts made by Japanese individuals to buy back swords. They figured out where the swords were and how to get them bought. That is when prices rose, when a number of serious buyers became active - servicing Japanese buyers. Newspapers in even small cities ran "wanted to buy add" several times a year.
That whole process deserves attention. To understand Japanese swords in the world today, we really have to recognize the role played by gunshow hustlers and fleamarket pickers in the post-War era.
Peter