It's well known that for centuries the Japanese have considered the Koreans as second class citizens and have treated them as such in any number of ways. Recently Professor Toike Noburu a professor of history at Ben-En Chofu University in Tokyo invoked Japan's freedom of information laws in an effort to establish a direct genealogical connection between Japan's imperial family and persistent rumours that it has Korean ancestry. He is also trying to learn why it is that the keepers of imperial secrets are going to such great lengths to keep this fact from being officially disclosed. Professor Noburu's efforts to pry open the imperial household's sanctuary is considered a bold move and there are scholars within Japan who applaud his efforts. Emperor Atihito is actually on record as referring to the Korean conection by saying quote: "It made him feel a certain closeness to Korea" unquote. However there exists strong resistance from the right not to disclose the facts so it will be interesting to see the outcome.
With cover ups like this that originate from the very top of the tree one can see why it is that Japanese writers of WWII history are so loose with the truth.
Prince of Dzun