Fuandou (不安道) was an obstacle from the 3rd Kunoichi tournament to the the 7th tournament. The obstacle was very similar to SASUKE's Yureru Hashi especially in the 3rd tournament, but the name change means some sort of modification was in play. The objective of Fuandou is to cross a bridge that is supported by a central axis, so that when a competitor tries to traverse the obstacle it spins. This obstacle has been the third, fourth, and fifth obstacle of the 1st stage then it was used in Denver on American Ninja Warrior 5 and named Rotating Bridge (chinese. 翻转危桥).
KUNOICHI 3 Version
The first version Fuandou was a replacement for the Boufuudou and Sekisho Michi from KUNOICHI 1 and KUNOICHI 2. It was extremely similar to SASUKE's Yureru Hashi with the only difference being that this bridge was longer and thinner. In addition the bridge rotated on a central axis, meaning it was being supported in the center. In order to make the obstacle more difficult, there was a block placed along the center of the obstacle, so competitors couldn't just walk across the obstacle. In addition the obstacle did not move much, and it rarely ever tilted to add difficulty. With poor placement as the fifth obstacle of stage one, this obstacle proved to be extremely easy, only retiring one person.
After Mizuno Yuko's near-kanzenseiha in the previous tournament, the first stage was given a modest re-design, and Fuandou was included. It now returned as the third obstacle, and unlike it's predecessor it was much more dangerous. While it still rotated on a central axis, and was the same length at five meters, three rectangles had been cut into the bridge, so competitors could either fall through the obstacle or cause the obstacle to flip by putting two much weight on one side of the obstacle. While this version proved to be much more difficult, it still did not take out a fair amount of competitors, especially in later tournaments, and most that failed the obstacle did so by taking mis-steps. Despite this, it occasionally proved to be a time waster, contributing to Hanzawa Tomomi timing out in the fourth tournament. It became the fourth obstacle in KUNOICHI 6 and KUNOICHI 7 where in these tournaments, the resting platform was placed higher up and curved, not unlike how the Balance Tank would later be modified for SASUKE 24, albeit without a rope at the end.
This version was also used as the third obstacle on American Ninja Warrior 5 in Denver called the Rotating Bridge.
Competitors' Success Rate