Oh, buddha knows, I love a good consipracy. Especially when it involves secret tunnels underneath an already exciting and mysterious sprawling urban landscape. Shun Akiba, a former war-time correspondant has potentially uncovered just such a scenario in Tokyo and thinks that there might be a conspiracy to keep the information hidden. Or maybe he's just drumming up book sales, but I still dig it :)
What changed his life was finding an old map in a secondhand bookstore. Comparing it to a contemporary map, he found significant variations. "Close to the Diet in Nagata-cho, current maps show two subways crossing. In the old map, they are parallel."
The journalist in him taking over, he sought out construction records. When responses proved defensive and noncooperative -- "lips zipped tight" -- he set out to prove that the two subway tunnels could not cross: "Engineering cannot lie."
From Fucked Gaijan