Yes, Kyōdō is telling us very little.
10:41 Abe to vist Tokyo hospital for health reasons: gov't source
Since he has shown no evident signs of physical pain or disfunction, he is either in really bad shape mentally or trying to duck questions.
The above explains the swarm of helicopters hovering over my office right now.
Later - Whoa, talk about ill omens.
According to Yomiuri, the PM has gone to Keiō Hospital--the hospital where the police took Matsuoka Toshikatsu's body after his suicide (and the hospital where Sakai Izumi mysteriously died).