Nihongo in Namibia
Sato-san, PLS is of course correct--you will have to take the chance and visit in person. Here is something to think about: you will probably be the only Japanese-speaking pilot, which will be a big advantage for companies which handle Japanese PAX. Or the Japanese Embassy or JICA. Face it, the whole idea of small aircraft is completely alien to nihonjin. You would be able to explain everything to them in Japanese and give them information and confidence they would not get otherwise and this will be an important part of their experience. You can arrange with your company for bento boxes for the Japanese visitors--they will love that, tell their friends, and maybe your company will get more business. Gambatte!