Kunoichi (; stylized as 女 KUNOICHI in Japan) is a women's obstacle course competition held in Japan and broadcast on the Tokyo Broadcasting System. It is a spin-off of Sasuke, another obstacle course series. Kunoichi is different from Sasuke in that the competitors are exclusively female. The show is re-broadcast as Women of Ninja Warrior on the American G4 channel. It originally ran for 8 tournaments between 2001 and 2009 with the first tournament held as Kinniku Banzuke special. In 2017, after an 8-year hiatus, it was renewed for a 9th tournament which aired on February 12, 2017. The 9th, 10th, and 11th tournaments took place on an indoor course at the Makuhari Messe Convention Hall, unlike past tournaments taking place at Mt. Midoriyama Studio City.
Participants
Participants compete for a prize of 2 million yen ($25,497 U.S. dollars).

Each competition starts with 100 competitors from a range of backgrounds such as actors, comedians, housewives, and athletes, amateur and Olympians alike. The competitors are mainly Japanese, but many international competitors have participated.

Kunoichi All-Stars
- This three-time consecutive Kunoichi champion has earned her the nickname "Queen of Kunoichi". Weighing only , Ayako is also an acrobatic dancer, who used to work for Muscle Musical. She achieved total victory in the 4th, 5th, and 6th competitions. In the 7th Competition however, she fell on the last obstacle of the Second Stage, the last part of the Swinging Beams, which was a metal beam without a rope support like the last two. Her failure left the other competitors in visible shock because, in the words of the narrator "She was the competitor everyone was counting on!" As of 2008, she has cleared the first stage four times in a row and the second, third and final stages three times in a row. Recently Ayako and a few other Muscle Musical members including the creator and Sayaka Asami broke away and created their own group, so it is now rumored that she will no longer compete. (This seems to be confirmed as she did not compete in Kunoichi 8.)

- This is one of the top competitors on Kunoichi and is notable for advancing all the way to the Third Stage in her first tournament, and failing Domino Hill(4th Competition). In the 5th Competition, she looked better than Miss Perfect herself, however by the time she reached the Skyway Pole in the final stage she looked defeated and her time ran out. She is a Japanese newscaster and went into modeling after her appearance on Kunoichi, before joining the Muscle Musical by the time of the 7th competition. Her run in the 6th competition was cut from the broadcast, but it is known that she failed stage 1. She was one of only four competitors who defeated the First Stage in the 7th competition, but she failed on the Monkey Bars in the Second Stage. As of 2008 she has cleared the first stage three times, the second stage twice, and the third stage once. Rie Komiya also competed in SASUKE 22, SASUKE 23, SASUKE 24 and SASUKE 26, being disqualified on the Jumping Spider and then failing the Half-pipe Attack, the Log Grip and the Rolling Escargot respectively. In Kunoichi 8 she became the second woman ever to beat the Final Stage.
- After almost completing the Final Stage in the 2nd and 3rd Competitions, she was thought to be the most likely competitor to complete the Final Stage, and was once thought to be the "Queen of Kunoichi". In the 3rd Competition, Yuko missed the button by 0.2 seconds. That was later similar to Makoto Nagano in Sasuke 12 (he reached the top of Final Stage's tower and missed the red button by 0.11 seconds). Since then, she has only made it to the Third Stage once (in the 5th competition), and hasn't passed the First Stage in the 4th, 6th and 7th competition. Besides being a Kunoichi competitor, she is also a celebrity athlete, and a regular Sasuke competitor. Fans also call her Ms. Kunoichi, for her similar status to Mr. Sasuke, Katsumi Yamada. As of 2008 she has cleared the first stage three times, the second stage three times and the third stage twice. She is also known as the Katsumi Yamada of Kunoichi.





