The Jūnidantobi (十二段跳び), aka the Twelve Timbers on G4 , was a Stage 1 obstacle that debuted in SASUKE 23 as the first obstacle. After SASUKE 24, the Jūnidantobi was replaced by the Dome Steps in SASUKE 25.

This obstacle was also used as the first obstacle in Stage One on American Ninja Warrior 5 , but was only called 'Timbers', because there were only eight to clear. The steps are also all angled the same way in this version (similar to Godantobi and Rokudantobi).


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

Competitors' Success Rate

  • All results based on the TBS broadcast and external information found
SASUKE Clears Attempts Percentage
23 84 104 80.60%
24 64 100 65.31%
ANW5 81 88 92.05%
Total 228 300 73.13%

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