Danchigaibou (段違棒) was a First Stage obstacle in KUNOICHI 7. The objective for this obstacle was to walk across a thick log about two meters long, and then jump down to a much thinner log of the same distance. Once a competitor landed on the second log, they had to walk across it and continue to the landing mats in order to clear it.
To make the obstacle more difficult, a button was placed before the obstacle that made a loud sound. This signaled the producers to start the Hishouchu, the obstacle after Danchigaibou. Due to this catch in the obstacle, competitors had to complete the obstacle quickly to prevent the Hishouchu from getting out of reach. This small addition to the obstacle proved to be lethal. It alone took out Mori Yoko, Haga Kayo, and Diana Pickler in addition to countless others. It is estimated that upwards of fifty people either failed the obstacle, some of them went out of the course, or did not clear it fast enough to reach the Hishouchu in time. Despite it's difficulty, it was removed for KUNOICHI 8 due to the show's new format.
This obstacle is also used in the SASUKE 21 Trials without the Hishouchu.
Note: Normally, the kanji "違" (chigau) is correctly pronounced as it is. However, based on the announcer pronunciation, "chigai" was used instead and so it will be used as it is then.
While the obstacle never appeared anywhere outside KUNOICHI, its concept of having competitors catch up in attempting the obstacle by attempting the obstacle before it has been adopted on American Ninja Warrior 13 with the appearance of the Dipping Birds and The High Road in Stage One.
Competitors' Success Rate