![](https://nautilus.org/wp-content/uploads/2015/12/Sigint-150x150.jpg)
US signals intelligence (SIGINT) activities in Japan 1945 – 2015: A Visual Guide Desmond Ball and Richard Tanter 23 December 2015 Full report available here [6MB]. I. Introduction The US maintained signals intelligence (SIGINT) activities at about 100 sites in Japan during the Cold War, probably than in any other country. In Japan today, about 1,000 […]