Airport for Beginners

There are 99 public airports in Japan. Do you think whether the airports would be too many or not. As you might imagine easily, there are not enough airports near large cities such as Tokyo and Osaka, but there are more rural airports than is necessary...
By the way, I love the technologies of the Space and Aviation because the technologies and systems are so high. There are many best idea for computer sciences.

Tips for Japan Airports
Largest & Busiest: Haneda, Smallest: Teshikaga
Northernmost: Rebun, Southernmost: Hateruma
Pilot Training: Shimojishima Highest elevation: Matsumoto
Riverside: Toyama