Number 100 (or #100) is a starting position given to competitors anticipated to have the highest chance of achieving Kanzenseiha during a tournament. While the numbering system has never been completely based on raw skill, it has usually gone to competitors who are either the current Grand Champion, or were among the best competitors in previous tournaments, with some exceptions due to special circumstances or the reputation of the competitor.
In the 10th, 20th and 30th anniversary competitions, the numbering was listed in the 1000s; as such, #100 was listed as #1000, #2000 and #3000 respectively.
In SASUKE 18, due to Nagano Makoto's Kanzenseiha, a special 1200m race was held with the winner getting to choose their number first. Kato Masafumi won the race, but would choose #77 instead, allowing Kume Ryouta to pick #100.
Yamada Katsumi was given #100 due to his vow of retirement should he fail to clear the First Stage during SASUKE 17. Although he failed to clear the stage, he would return for SASUKE 18 and numerous tournaments afterward. Nagano Makoto was given #100 during SASUKE 28 due to the anticipated retirement of the SASUKE All-Stars although multiple All-Stars would return for following tournaments. However, in SASUKE 32, he was given #100 one final time due to his own self-imposed retirement.
Number 100 in SASUKE has been worn fifteen times by Nagano Makoto, seven times by Yamada Katsumi and Morimoto Yūsuke, three times by Akiyama Kazuhiko, twice by Urushihara Yuuji, and once by four others: Kawashima Hiroshi, Omori Akira, Kume Ryouta, and Matachi Ryo.
|SASUKE 1||Kawashima Hiroshi||Failed Burasagari Maruta. First Stage|
|SASUKE 2||Akiyama Kazuhiko||Timed out on Wall Lifting Run. Second Stage|
|SASUKE 3||Omori Akira||Timed out Tsuna Nobori (About 8m up). Final Stage|
|SASUKE 4||Yamada Katsumi||Failed Cliffhanger. Third Stage|
|SASUKE 5||Yamada Katsumi||Failed Spider Walk. Second Stage||First to wear #100 Twice|
|SASUKE 6||Akiyama Kazuhiko||Failed Jump Hang. First Stage||Given #100 because of his SASUKE 4 Kanzenseiha|
|SASUKE 7||Yamada Katsumi||Timed out on Rope Climb. First Stage|
|SASUKE 8||Yamada Katsumi||Timed out on Soritatsu Kabe. First Stage||Cleared Soritatsu Kabe and Rope Climb after defeat.|
|SASUKE 9||Akiyama Kazuhiko||Failed Godantobi when his foot skimmed the water. First Stage||Worst result for #100|
|SASUKE 10||Yamada Katsumi||Failed Pipe Slider. Third Stage||Failed jump to platform. Actually wore #1000|
|SASUKE 11||Yamada Katsumi||Failed Balance Tank. Second Stage|
|SASUKE 12||Nagano Makoto||Timed out Tsuna Nobori (0.11s late). Final Stage||Nagano was close to pressing the final button and had reached for it with his right hand. However, the rope swung back before he could do so, and he timed out.|
|SASUKE 13||Nagano Makoto||Timed out Tsuna Nobori (10cm away). Final Stage|
|SASUKE 14||Nagano Makoto||Failed Jumping Bars. Third Stage||Fell on third bar. First tournament the final obstacle(s) of the 3rd Stage were not reached.|
|SASUKE 15||Nagano Makoto||Failed Metal Spin. Second Stage||Only person to fail Second Stage in this tournament.|
|SASUKE 16||Nagano Makoto||Failed Devil Balanço Third Stage||Knocked the Pipe Slider bar away and out of reach.|
|SASUKE 17||Yamada Katsumi||Timed out Soritatsu Kabe. First Stage||Was atop the obstacle when time expired.|
|SASUKE 18||Kume Ryouta||Failed Pole Maze. First Stage||Came second in 1200m race to choose number.|
|SASUKE 19||Nagano Makoto||Failed Flying Chute. First Stage|
|SASUKE 20||Nagano Makoto||Failed Downhill Jump. Second Stage||Actually wore #2000|
|SASUKE 21||Nagano Makoto||Failed Gliding Ring. Third Stage||A flaw in the design caused him to have to force the ring down the track.|
|SASUKE 22||Nagano Makoto||Failed Slider Jump. First Stage|
|SASUKE 23||Nagano Makoto||Timed out G-Rope (0.21s late). Final Stage||Final Stage time limit had been reduced from 45 to 40 seconds|
|SASUKE 24||Nagano Makoto||Failed Jumping Spider. First Stage||Made it to the end of the obstacle but slipped and fell into the water.|
|SASUKE 25||Urushihara Yuuji||Failed Double Salmon Ladder. Second Stage||Course Out. His foot skimmed the water. Given #100 for his SASUKE 24 Kanzenseiha.|
|SASUKE 26||Urushihara Yuuji||Failed Half-Pipe Attack. First Stage|
|SASUKE 27||Nagano Makoto||Failed Ultimate Cliffhanger. Third Stage||Transition from the 4th to 5th ledge.|
|SASUKE 28||Nagano Makoto||Timed out Ni Ren Soritatsu Kabe. First Stage||Time Out on Second Wall.|
|SASUKE 29||Nagano Makoto||Timed out Ni Ren Soritatsu Kabe. First Stage||Time Out on Second Wall. Injured right hamstring on Long Jump.|
|SASUKE 30||Morimoto Yūsuke||Timed out Wall Lifting. Second Stage||Timed out on third wall. Actually wore #3000|
|SASUKE 31||Matachi Ryo||Timed out Soritatsu Kabe. First Stage|
|SASUKE 32||Nagano Makoto||Timed out Lumberjack Climb. First Stage||Nagano Makoto was given #100 for his final competition. Was atop the obstacle when time expired|
|SASUKE 33||Morimoto Yūsuke||Failed Flying Bar. Third Stage||Misjudged the distance of transition from first to second rung.|
|SASUKE 34||Morimoto Yūsuke||Failed Vertical Limit Kai. Third Stage|
|SASUKE 35||Morimoto Yūsuke||Timed out Tsuna Nobori. Final Stage (About 20m up)||First competitor to attempt the redesigned Final Stage. First to clear the Third Stage after his own Kanzenseiha.|
|SASUKE 36||Morimoto Yūsuke||Timed out Tsuna Nobori. Final Stage (About 24.5m up)||Pressed the button late by 0.5 seconds.|
|SASUKE 37||Morimoto Yūsuke||Timed out Soritatsu Kabe. First Stage|
|SASUKE 38||Morimoto Yūsuke||Kanzenseiha||2.52 seconds left. Second person to achieve kanzenseiha twice in SASUKE. Best result by a number 100.|
KUNOICHI has had more success at the position, as during Miyake Ayako's three-tournament Kanzenseiha streak, she was designated #100 in the fifth and sixth tournaments. Mizuno Yūko is the closest near-miss, missing Kanzenseiha by 0.12 seconds in KUNOICHI 3.
For the reboot, the number of overall competitors has been reduced to 50 instead of the typical 100. No one has achieved Kanzenseiha while wearing #50 during the reboot.
Number 100 in KUNOICHI has achieved Kanzenseiha twice, failed the Final Stage once, the Third Stage (BLACK Stage in the reboot) once, the Second Stage (BLUE Stage in the reboot) twice and the First Stage (RED Stage in the reboot) four times.
Number 50 in the reboot has failed the RED Stage twice, and the BLACK Stage once. Number 50 has never failed the BLUE Stage and never attempted the Final Stage.
|KUNOICHI 1||Yusa Masami||Failed Daichoyaku. Second Stage|
|KUNOICHI 2||Yamada Miho||Failed Enchu Nori. First Stage|
|KUNOICHI 3||Mizuno Yūko||Timed out Skyway Pole. Final Stage||Failed by 0.12 seconds|
|KUNOICHI 4||Mizuno Yūko||Failed Buyoishi. First Stage||Worst result by a #100 in KUNOICHI. First to wear #100 twice.|
|KUNOICHI 5||Miyake Ayako||Kanzenseiha||7.71 seconds left. First Kanzenseiha as #100 in SASUKE or KUNOICHI. One of three to achieve Kanzenseiha twice.|
|KUNOICHI 6||Miyake Ayako||Kanzenseiha||0.66 seconds left. Third consecutive Kanzenseiha. Only person to achieve Kanzenseiha thrice.|
|KUNOICHI 7||Miyake Ayako||Failed Burandou. Second Stage.||First to wear #100 three times. First time failing in KUNOICHI.|
|KUNOICHI 8||Tanaka Maho||Failed Shomouheki, First Stage.||The change of format to a race in groups of four in the First Stage means the numbering system for that tournament is ambiguous.|
|KUNOICHI 9||Mizuno Yūko||Failed Fish Bone, RED Stage.||Second to wear final position three times. Wore #50.|
|KUNOICHI 10||Izumi Hikari||Failed Pipe Slider, BLACK Stage.||Last Woman Standing in KUNOICHI 9 & 10. Wore #50.|
|KUNOICHI 11||AYA||Failed Fish Bone, RED Stage.||Wore #50. Received due to Izumi Hikari and Watanabe Kana's absences.|