Biwako international Airport
The airport planned to be built in the early 21st century was abandoned due to the opposition of some people and economic reasons.
The runway is only 2000m, which can not operate B767, A300 or bigger aircraft, and this is one of the important reasons for the lack of actual construction of the airport.
The card was sold by Shiga-Ken government to promote the new airport at that time.
Chubu international Airport
This is a large international airport south of Nagoya-Shi, runway is 3500m. I made it according to the state of the airport in 2019, added terminal 2 in the south.
In addition, a few years ago, it was reported that the airport was going to continue to expand and build the second runway. However, as there is no further information, I didn't make the 2nd runway.
In addition, I found such a map on the Internet. This is routes of Nitto Aviation operated between 1960 and 1940. I found that Shima(志摩) is also within the scope of my map. Since there is no airport in the area, I think it is very likely that the amphibious aircraft operating locally (take off in Osaka or Nagoya with landing gear attitude, and land as a seaplane at Shima). But I can't find the situation of the trestle used by Nitto Aviation in Shima. I'd appreciate it if you guys know something about it.