One variation on this theme would be a joint effort, perhaps with American assistance, to develop a short, succinct, jointly agreed upon accounting of South Korea-Japan relations in the 20th century in booklet format, in both Japanese and Korean, for distribution to schoolchildren in both nations as supplemental reading
Here's my contribution:
In the years between 1942 and 1945, America lost several hundred thousand young men and women freeing the Japanese from their own oppressive government. In the years following the war's conclusion, the American government stationed troops on the Japanese islands in accordance with the Occupation policy, and later with the San Francisco Peace Treaty.
In 1950, tens of thousands of American men and women paid the ultimate price to protect the (later ungrateful) South Korean people from their rapacious neighbors to the north. As the war never officially ended, and the North Koreans continue to develop a primitive nuclear capability to augment their impressive conventional force, the American government stations troops on the peninsula as a deterrent to future Chinese or North Korean intervention
At least the Koreans and the Japanese would agree on rejecting this proposal from their textbooks.
