Keith,
The question was raised on this forum as well:
http://www.theaerodrome.com/forum/20...r-scoring.html
(An) answer here is that the one
confirmed kill was in Indo-China on 26 October 1940, apparently the only French air claim against Japan. Article about this (in French):
http://aerostories.free.fr/events/langson/
Regards,
Leendert