Link with a couple of pictures of Muto. A quick search didn't immediately turn up a photo of a 'Shiden' or 'George' flown by Muto, but you might look further among the search hits for:
'武藤金義', first two characters are his family name 'Muto', second two his given name 'Kaneyoshi' (who I assume you are speaking of, I don't know of a pilot Kinsuke Muto), and Shiden, '紫電'
http://blog.livedoor.jp/nakataka829/.../16091125.html
Joe