Looking for testing field for RC plane

Hello! I am an international student in Japan, and I am interested in planes. I am building a small RC airplane that weights around 4-5 kg, and I want to test it. But as you know, it makes noise and for the safety, I can't fly it near the city. I am from Kyoto, and I would like to know if there are any testing fields around this area. I can speak some amount of Japanese and I also have a supervisor who is Japanese. Although I researched up on the internet, I would like to get an advice on how to obtain permission from the government if anyone has experience.

Have you Googled リコモン 飛行機 京都 ?

https://www.google.com/search?q=%E3%83%AA%E3%82%B3%E3%83%A2%E3%83%B3+%...