Funny thing was that they could have used kites like Børge Ousland, who sometimes moved hundred kilometers per day. There is nothing radically different in mode

Funny thing was that they could have used kites like Børge Ousland, who sometimes moved hundred kilometers per day. There is nothing radically different in modern kites. Especially if they had visited Japan. Rokkaku-kite is just few bamboo sticks and canvas and scales up to 10 square meters. And you can chain them, if you want more speed.