>>1900490>Minatomirai LineIt's a bit unfair to compare adding a branch line to an airport in a rural-ish area to what essentially is Albatross: The Line, which took 13 years to dig 4.1km and only began to make a profit starting in 2016 (although in terms of Albatross-ness I'm not sure if it is worse between Minatomiral Line, Oedo Line, or any other ones that I'm not aware of)
>>1900492The airport had been a thing for 50 years but the new terminal building just opened last week, and as far as rail access is concerned the idea was brought up in the late 90s to early 2000s but it was shelved in 2008 due to cost and perceived lack of ridership.
https://www.pref.kumamoto.jp/uploaded/attachment/123046.pdf 