According to this article, "the recovery of tourism has been tardy in the city of Aso, although it has Mt. Aso, one of the most famous sightseeing spots in the prefecture in the Kyushu region, partly because of the slow pace of restoration in transport infrastructure."
-- Kirk
http://the-japan-news.com/news/article/0003638920
Slow travel recovery hampers Aso tourism
ASO, Kumamoto (Jiji Press) — Many sightseeing spots in Kumamoto Prefecture are gradually winning back visitors a year after a series of powerful earthquakes.