I rewrote this article on November 11, 2016.
Fudo Pass along Tour de Tsukuba has been blocked since late August.
The pass is popular among cyclists.
I enjoyed cycling through it a few weeks before being blocked.
The information that Fudo Pass has been blocked is on a website at Ishioka City disaster, response & risk management portal.
http://www.city.ishioka.lg.jp/page/page004060.html Broken link (October 19, 2017))
This website says :
Fudo Pass along Prefectural road Ishioka-Tsukuba Line has been closed to traffic due to landslides.
It takes quite a long time to repair the road.
Ishioka-Tsukuba Line runs from Hojo Tsukuba to Yasato Ishioka through Fudo Pass.
There is a movie in which a car is running Prefectural road Ishioka-Tsukuba Line on YouTube.