The Jūnidantobi (十二段跳び) was a First Stage obstacle that debuted in SASUKE 23 as the first obstacle. After SASUKE 24, the Jūnidantobi was replaced by the Dome Steps in SASUKE 25.

Similar to the Godantobi and Rokudantobi, the Jūnidantobi is a set of eleven slanted planks, five on one side and six on the other, that competitors must jump across in order made it to the twelfth step, the finishing platform, hence the name. They are packed slightly closer together, and each log is angled slightly different to increase the difficulty.

Interestingly, unlike the Godantobi and Rokudantobi (when during the broadcast of Ninja Warrior, the obstacles were called Quintuple Step and Sextuple Step respectively), instead of Duodecuple Step (following the naming pattern), the Jūnidantobi was called Twelve Timbers during the broadcast of Ninja Warrior, although there were actually eleven timbers instead of twelve.

American Ninja Warrior Appearances

American Ninja Warrior 5's Timbers in Stage One

The Jūnidantobi appeared as the first obstacle in Stage One on American Ninja Warrior 5, replacing the Step Slider from the previous season, but was only called as the Timbers. Compared to the Jūnidantobi:

  • There were only 8 steps instead of 11, and
  • All the steps were angled the same way in this version (similar to the Godantobi or Rokudantobi).

On American Ninja Warrior 6, it was replaced by the Piston Road.

Competitors' Success Rate

  • All results based on the TBS/NBC broadcast and external information found


SASUKE Clears Attempts Percentage
23 79 100 79%
24 71 100 71%
Total 150 200 75%

American Ninja Warrior

ANW Clears Attempts Percentage
ANW5 81 85 95.29%
USA vs. Japan 6 6 100%
Total 87 91 95.60%

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