One hundred participants are given the opportunity to attempt the First Stage (ファースト ステージ), a course which primarily tests one's speed. The object is to hit the buzzer at the end of the course before the allotted time expires. If a competitor goes out of bounds or comes into contact with the water in any of the pits below the course, he or she is disqualified.
Typically, 85 to 90 of the 100 original entrants are eliminated in this stage. However, in the 4th tournament, a record 37 of the original 100 competitors made it past the First Stage. After a kanzenseiha was achieved, (in the 4th, 17th, 24th, 27th, and 31st tournaments) and also in SASUKE 12 for a near kanzenseiha, the First Stage was thoroughly redesigned to be much more difficult and prevent large numbers of people from moving on.
In fact, a G4 special inside the making of the 18th SASUKE competition revealed that the redesign of the first stage for that competition was done with the intention of seeing all 100 challengers fail it. This did not happen, however, and that has only spurred the production team on to make this and all stages to follow even harder. That goal was almost met in the 19th competition, where much to everyone's surprise, only two competitors cleared the First Stage (neither of the two being SASUKE All-Stars), the least in SASUKE history. Furthermore, in tournaments 5 and 20, only three competitors cleared the First Stage.
In the first 17 SASUKE competitions, the time limit of the stage ranges from 60 to 103, making competitors to be as fast as possible to clear.
Starting from SASUKE 18, the tournament after Nagano Makoto's kanzenseiha and the start of the Shin-SASUKE era, to SASUKE 27, the final tournament of SASUKE to be broadcast by Monster9, the time limit would eventually become higher than 100 seconds, with the highest being 130 seconds in SASUKE 18, 26 and 27 and the lowest being 115 seconds in SASUKE 19 and 25.
Following the second kanzenseiha of Urushihara Yuuji, in SASUKE RISING, the stage would be designed to be a speed stage once again, as the stage's time limit decreased to 105 seconds. However, with the debut of the Tackle in SASUKE 31, the time limit was increased once again due to the difficulty of this obstacle.
In SASUKE 35, the stage was moderately modified, with the time limit being drastically reduced to 85 seconds (38 seconds less than the previous tournament), making it the first tournament since SASUKE 17 that the First Stage's time limit was below 100 seconds (coincidentally, that tournament also carried an 85-second time limit for the First Stage) and the lowest in any tournament since Shin-SASUKE and SASUKE RISING's era.
TBS Obstacle Names
+ - This obstacle leads directly into the next, without any break.
G4 Obstacle Names
|Comp #||First Stage Obstacles||Time Limit|
|1||Cataract Climb||Log Dangle||Rapid Descent||Wicked Wall||Shaking Bridge||Subduction Zone||70.0|
|2||Barrel Climb||Spinning Log||Rapid Descent||Hill Climb||Balance Bridge||Mountain Climb||60.0|
|3||Barrel Climb||Rolling Log||Balance Bridge||Rapid Descent||Hill Climb||Rope Climb||60.0|
|4||Barrel Climb||Rolling Log||Balance Bridge||Rapid Descent||Hill Climb||Rope Climb||60.0|
|5||Barrel Climb||Rolling Log||Balance Bridge||Jump Hang||Warped Wall||Rope Climb||75.0|
|6||Barrel Climb||Rolling Log||Balance Bridge||Jump Hang||Warped Wall||Rope Climb||75.0|
|7||Barrel Climb||Rolling Log||Balance Bridge||Jump Hang||Warped Wall||Rope Climb||75.0|
|8||Quintuple Step||Rolling Log||Big Boulder||Jump Hang||Warped Wall||Rope Climb||77.0|
|9||Quintuple Step||Rolling Log||Big Boulder||Jump Hang||Warped Wall||Rope Climb||77.0|
|10||Quintuple Step||Rolling Log||Dance Bridge||Jump Hang||Warped Wall||Tarzan Jump||+||Rope Climb||80.0|
|11||Quintuple Step||Rolling Log||Balance Bridge||Jump Hang||Warped Wall||Tarzan Jump||+||Rope Climb||85.0|
|12||Hill Climb||Rolling Log||Plank Bridge||Jump Hang||Warped Wall||Tarzan Jump||+||Rope Climb||85.0|
|13||Prism Tilt||Rolling Log||Bridge of Blades||Jump Hang||Crooked Wall||Warped Wall||Rope Climb||80.0|
|14||Cone Jump||Butterfly Wall||Rolling Log||Bridge of Blades||Jump Hang||Crooked Wall||Warped Wall||Rope Climb||103.0|
|15||Hurdle Jump||Butterfly Wall||Rolling Log||Bridge of Blades||Jump Hang||Crooked Wall||Warped Wall||Rope Climb||95.0|
|16||Sextuple Step||Rolling Log||Bridge of Blades||Jump Hang||Rope Reverse||Reverse Fly||Warped Wall||Rope Climb||100.0|
|17||Sextuple Step||Log Slope||Rolling Log||Bridge of Blades||Circle Slider||Jump Hang||Warped Wall||Rope Climb||85.0|
|18||Rope Glider||Log Grip||Pole Maze||Jumping Spider||Bungee Bridge||Great Wall||Flying Chute||Tarzan Rope||+||Rope Ladder||130.0|
|19||Sextuple Step||Log Grip||Pole Maze||Jumping Spider||Halfpipe Attack||Warped Wall||Flying Chute||Tarzan Rope||+||Rope Ladder||115.0|
|20||Sextuple Step||Log Grip||Pole Maze||Jumping Spider||Halfpipe Attack||Warped Wall||Flying Chute||Tarzan Rope||+||Rope Ladder||120.0|
|21||Sextuple Step||Log Grip||Pole Maze||Jumping Spider||Halfpipe Attack||Warped Wall||Flying Chute||Tarzan Rope||+||Rope Ladder||120.0|
|22||Sextuple Step||Circle Hammer||Log Grip||Jumping Spider||Halfpipe Attack||Warped Wall||Slider Jump||Tarzan Rope||+||Rope Ladder||120.0|
|23||Twelve Timbers||Curtain Slider||Log Grip||Jumping Spider||Halfpipe Attack||Warped Wall||Slider Jump||Tarzan Rope||+||Rope Ladder||120.0|
|24||Twelve Timbers||Bridge of Blades||Log Grip||Jumping Spider||Halfpipe Attack||Warped Wall||Slider Jump||Tarzan Rope||+||Rope Ladder||120.0|
|25||Dome Steps||Rolling Log||Jump Hang||Bridge Jump||Log Grip||Warped Wall||Circle Slider||Tarzan Rope||+||Rope Ladder||115.0|
|26||Step Slider||Hazard Swing||Rolling Escargot||Jumping Spider||Halfpipe Attack||Warped Wall||Giant Swing||Tarzan Rope||+||Rope Ladder||130.0|
|Rolling Escargot||Giant Swing||Jumping Spider||Halfpipe Attack||Warped Wall||Spinning Bridge||Tarzan Rope||+||Rope Ladder||125.0|
Challenge Obstacle Names
|Comp #||First Stage Obstacles||Time Limit|
|28||Quintuple Step||Rolling Escargot||Spinning Bridge||Jump Hang Kai||[Double] Warped Wall||Tarzan Rope||+||Rope Ladder||105.0|
|29||Long Jump||Log Grip||Hedgehog||Jump Hang Kai||[Double] Warped Wall||Tarzan Rope||+||Rope Ladder||105.0|
|30||Long Jump||Log Grip||Hedgehog||Jump Hang Kai||[Double] Warped Wall||Tarzan Rope||Lumberjack Climb||105.0|
|31||Rolling Hill||Log Grip||Music Box||Jump Hang||Triple Tackle||Warped Wall||Tarzan Rope||Lumberjack Climb||120.0|
|32||Quad Steps||Rolling Hill||Prop Slider||Music Box||Double Pendulum||Triple Tackle||Warped Wall||Tarzan Rope||Lumberjack Climb||115.0|
|33||Quad Steps||Rolling Hill||Prop Slider||Fishbone||Double Pendulum||Triple Tackle||Warped Wall||Tarzan Rope||Lumberjack Climb||128.0|
|34||Quad Steps||Rolling Hill||Prop Slider||Fishbone||Double Pendulum||Triple Tackle||Warped Wall||Tarzan Rope||Lumberjack Climb||123.0|