Takagi San Imternational Airport was located in Tonosho, Kagawa Prefecture, Japan. It's believed that random Japanese drawer by the name of "Soichiro Yamamoto" was behind of Takagi San International Airport construction. It's first constructed in 2013, and opened in 2018.
Takagi San Airport was become popular in 2019 after the promotion of "Sesson 2" since it was opened, the cause and effect of this popularity is unknown, but there's a rumor that the Instagram and Reddit was behind of this popularity
The route that this airport serves is currently unknown, since every plane from this airport is always lost contact from ATC radar. But, it's believed that this airport serves both domestic flight and international flight
Gotta go to Takagi San International Airport before it's too late!