I was wondering if the kanji of the first name could be misread? currently I think the interpretation is 勝美. Are there close characters, especially for the 2nd kanji? Given the current characters, 勝 could be katsu or masa, and 美 is "bi" or utsuku or shi.
Based on the separate characters of the last name, the name combos' could be handa, honda, or tomoda, maybe also yuda, yuden, sorita, sorida.
Its a long shot, but the only named pilots I can find are aces, so any posibility the name is one of these: (I can't look up the characters)
Handa Watari
Honda Minoru
Honda Toshiaki
Shiga Masami