Yanagi renji
Renji Yanagi



Yanagi Renji


Data Master
3 Demons/Monsters of Rikkai






181 cm


67 kg


June 4



Blood Type



Older Sister

Junior High

Rikkaidai (3rd Year)





Club Position


Elementary School

Midorigawa First (Dai-ichi ) Elementary School
Kanagawa Second (Dai-ni) Elementary School

Japan U-17 Camp

Court 2
No.17 of All Japan Representative

Dominant Arm


Play Style

Counter Puncher

Doubles Partner(s)

Inui Sadaharu
Kirihara Akaya
Sanada Genichirō
Niō Masaharu


Völkl Catapult V1 Midplus


Diadora Rebound Ace DA2 (128076 - ED784)

Manga Debut

Genius 182


Atobe's Gift
Battle of the British Castle

Voice Actor

Eiji Takemoto (Japanese)

Renji Yanagi (柳 蓮二, Yanagi Renji) is a 3rd year regular at Rikkai Daigaku Fuzoku and is known as one of the Three Demons (Sannin Bakemono) along with Captain Yukimura Seiichi and Vice-Captain Sanada Genichiro. He is a childhood friend and doubles partner of Inui Sadaharu, from Seigaku. He is known as the Data Master.


Yanagi usually plays in singles, but sometimes in doubles. He is the friend and former doubles partner of Sadaharu Inui, having been known as the "Professor". He keeps his eyes perpetually closed just as Inui hides his eyes behind his thick glasses. He is Inui's rival in using Data Tennis, having taught Inui in the first place. In New Prince of Tennis,  it is revealed that he himself learned Data Tennis from Mitsuya Akuto.


Yanagi is a tall middle schooler with a bob cut hairstyle. He is often seen with his eyes slightly closed and he rarely opens them. His eyes are brown and his hair is black (brown in the anime).


  • Yanagi dressing up as a ghost.

Yanagi is quiet, mysterious, soft-spoken and has a somewhat acid sense of humor. The way he speaks is quite concise but comprehensive as he usually gets straight to the point and mentions only important pieces of information. He is extraordinarily intelligent as well as observant, often detecting tiny details others fail to realize. Besides, he can be very sensible and understand other people's true feelings by observing their behaviours even before the people themselves realize it. This can be seen in Sanada's route in Gakuensai no Ouji-sama where Renji figures out Sanada is in love with the protagonist before Sanada himself does. He is also the kind of person who does not like to give answers straight out but rather let people dwell on their own thoughts and figure it out themselves.

He is somewhat more approachable than the aloof and serious Sanada. Still, Yanagi can be as rough as the other Demons (Sanada and Yukimura) under some circumstances; in the manga, he once hit Kirihara for asking him a stupid question in public, and also asked Sanada to slap him if he lost against Inui.


Four Years Prior To The StorylineEdit

Inui and Yanagi at 10

Yanagi and Inui after practice at age 10.

Yanagi and Inui used to attend the same elementary school and formed a powerful Doubles team that went impeccable and invincible. Someday after the regular practice, they decided to determine which one of them was stronger, so they had a match that ended up 5-4 because the tennis club they were in was off-duty. They vowed to accomplish the match while going home. However, Yanagi unexpectedly moved to Kanagawa, which resulted in that they did not see each other in the next 4 Years, 2 Months and 15 Days which was calculated by Inui.

Two Years Prior To The StorylineEdit

Yanagi won the Nationals in his freshman year at Rikkai Dai along with Yukimura Seiichi and Sanada Genichirou. He became a regular and easily won their Prefectural Tournament and went on to win the Regionals and won the Nationals in his first year along with Sanada and Yanagi in the side also.

One Year Prior To The StorylineEdit

At the start of this year, during tennis club training, he meets Kirihara and utterly defeats him. Yukimura and Sanada do the same.

Yanagi and his unnamed doubles partner crush Shitenhōji's Zaizen Hikaru and Koishikawa Kenjirō at the National Semifinals in Doubles 2. They win the nationals for the second time in a row, this time, in the Award photo is Yukimura Seiichi, Sanada Genichirou and Yagyuu Hiroshi.


Rikkai red01

Yanagi, Kirihara, and Sanada in their red Rikkai tennis uniforms

Rikkai Dai's Kirihara, Yanagi, and Sanada appears watching the Kanto Regiona's Round 1 match between Seigaku and Hyoutei- Tezuka and Atobe's match to be exact. They stay and watch Ryoma's match with Hiyoshi as well. It is interesting to note that during this appearence, the Rikkai tennis uniform appears red.

Yanagi and Rikkai Dai cruised through to the finals of the Kanto Regional Tournament and defeated Fudomine in the Semifinals where Yanagi partnered up with Sanada Genichiro in Doubles against Ibu Shinji and Kamio Akira of Fudomine. Yanagi/Sanada won effortlessly and Rikkai swiftly advanced to the final.

In the final, he played singles against his childhood friend Inui Sadaharu, but lost.


Yanagi and Rikkai Dai go into the National Tournament expecting nothing less than victory. They easily crush all their opposition from the first round until they reach the Semifinals and drop their first games and first sets of the tournament against Nagoya Seitoku.

However it was revealed that they gave up the first two matches on purpose to pile pressure on Kirihara Akaya so he could bring out his new Devil Mode. Yanagi then pairs up with Niō Masaharu for Doubles 2 and wins comfortably.

Yanagi pairs up with Kirihara for the D2 match against Inui and Kaidoh for the National Finals. When Kirihara goes into Devil Mode after Kaidoh hits him, Yanagi allows his teammate to continue on in that state, though he calms Kirihara down when Kirihara steps and breaks Inui's glasses. Yanagi does not stop Kirihara from hitting Inui, but tells Inui to give up because the match was pointless. They then win as the Seigaku pair forfeits, angering a Fuji who played S2 next against Niou.

Prior To U-17 CampEdit

Inui and Yanagi doing Inui Juice

Yanagi with Inui working on juices.

Yanagi and Inui work on an Inui Juice recipe and Yanagi decides to bring the drink to the Rikkai tennis club.

U-17 CampEdit

Yanagi arrives to the U-17 camp with all of the other Rikkaidai regulars. He notices after watching Momoshiro's planned match that they should watch out for the coaches.

  • Yanagi against Kirihara in their tie-break.
  • Yanagi with teammates Kirihara and Yagyuu as Yukimura defeats Sanada in the tie-break.

He pairs up with Kirihara during the Tiebreak elimination match, and was 1 point away from winning but then forfeits the game. He tells Kirihara that he needed to stay behind in the camp, saying "crawl higher" and then leaving with Sanada while his teammates looked on. Yanagi realized that Kirihara had to grow in order to lead the Rikkai tennis team to the Nationals next year.

All the Middle Schoolers that lost their tie-break are taken away from the camp by coach however the driver takes a detour and they are met by the Mental Coach who takes them to to a mountain. He tells them to climb a mountain by the camp if they want the chance to stay in the camp. Yanagi and the 26 other middle schoolers complete this task and end up meeting the High Schoolers who were unable to attain a ball from the helicopter amd begin to train in the mountains.


Yanagi and Inui using data tennis on the court's topography to return the irregularly bouncing ball.

Yanagi and the rest of the middle school losers begin their training in the mountain, where he plays with the middle schoolers against the losing high schoolers on the court with an irregular bounce due to its topography.

However, he and Inui use their Data tennis and play the high schooler until it was 2 vs. 3 this was an unfair competition as in reality, the Middle Schoolers had won due to the High Schoolers having far more players on their team than the middle schoolers giving them the unfair advanatage.

The Middle School losers are then forced to sleep in the cave due to losing this encounter so tightly. The next challenge involved having a balloon attached to all the members of the Mountain training's waist, both Middle Schoolers and High Schoolers.

The Middle Schoolers return back the main U-17 Camp, and completely defeat 2nd Court.

U-17 Camp RevolutionEdit

  • Renji stopped moving while fighting Akuto
  • Yanagi kneeled

Yanagi faces his Data Tennis teacher Mitsuya Akuto the All-Japan Junior No. 17. Partway through the match, Yanagi loses motivation to continue because he calculates that the probability of his victory was 0%. Inui Sadaharu, who was watching the match, however, calls out to him and reminds him of nationals, convincing Yanagi to discard his data and play with all he has. Yanagi is utterly defeated, despite playing his best. He loses the match and collapses, entrusting the match to Inui, who Yanagi says has a 33.1% probability of winning, likely due to the data he was able to collect during Yanagi's match.

It appears that Inui defeated Mitsuya Akuto, but Yanagi is seen wearing the No. 17 badge instead of Inui when the middle schoolers return to the courts. Inui helps him stand upright and walk after the match.

Genius 10 ChallengeEdit

Yanagi and the majority of the camp play audience to the match between Top 10 and their Middle School challengers. He and the data players comment on the players of the 1st match No.10 Juzaburō Mōri, his former Rikkai teammate in the year above him, and No.9 Ochi Tsukimitsu.

Tennis RecordEdit


Round School Position Partner Opponent(s) Score
2007 Nationals Semifinals Shitenhōji Doubles 1 Unknown Zaizen Hikaru/Koishikawa Kenjirō Won (6-0)
2008 Nationals Finals Seishun Gakuen Doubles 2 Kirihara Akaya Inui Sadaharu/Kaido Kaoru Won (5-1)* Due to Forfeit

Playing Style and TechniquesEdit

Yanagi is a counterpuncher and a Data Tennis player, capable to mix the two playstyles in a frightening combination to observe the opponent and slowly destroy them. His analytic abilities and his own abilities as a formidable tennis player makes it hard for people to find his weak spot while Yanagi easily finds the opponent's. Yanagi's analysis also makes him fit for doubles, as he works well with his teammates Sanada and Nio and is one of the notable members that can keep his fellow teammate Kirihara Akaya contained when he's in his Devil Mode.

His skills gave him the title of "Master" and earned him a consistent spot in the famous Rikkai Dai regulars ever since he was a freshman ever since enrolling into the middle school and helped lead the team to the Nationals Championship with fellow teammates Sanada and Yukimura, giving the three the title of "The Three Demons of Rikkai."

Data Tennis

A style of tennis based on data gathered on the opponents, Yanagi learned this from Mitsuya Akuto and taught it to Inui Sadaharu. Like Inui, Yanagi can quickly calculate where the next ball will land at and shows a sharp understanding of a player's psychology. Unlike Inui, however, Yanagi can calculate further than him to the point where he can predict what someone would say next. Yanagi uses his observation to not only outpredict an opponent, but he can use it to outplay an opponent and destroy their fundamental style of tennis, effectively shutting down their efforts.

However, his Data Tennis can only predict so much; during his Singles 3 match against Inui, Yanagi was unable to realize that Inui was recreating their previous match they had until the score was set to where the duo left off. Also, he was unable to respond to Kaido's Tornado Snake/Gyro Laser tactic. His Data Tennis can be wrong as well, as he was unable to correctly predict Akuto's next words, and the data he collects from his Data Tennis is not always favorable, as he can predict his own losses due to being unable to match up to the opponent's skills.

Kamaitachi (Wind Blade)

A super high-speed (usually backhand) slice shot that can suddenly sink and hit the baseline, Yanagi was shown to be able to use this technique despite positioning his body low during his take-back for the swing. The backspin generated by the high-speed swing allows the ball to sink suddenly after reaching a certain level of speed. This technique is shown to create wind blades (hence its name) for visual effect when this move is utilized.

Utsusemi (Cicada)

A drop shot similar to Tezuka Kunimitsu's Zero Shiki Drop, the ball rolls toward the returner after landing.

U-17 Camp StatsEdit

  • Speed: 3
  • Technique: 5
  • Mental: 4
  • Stamina: 3
  • Power: 3

Personal InformationEdit

  • Foot Size: 26 cm
  • Hobby: Reading (pure literature)
  • Family Composition: Grandparents, Father, Mother, Older Sister
  • Father's Occupation: CPA (Certified Public Accountant)
  • Uses allowance on: Books
  • Favorite Motto: "One thousand days' training to forge, ten thousand days' training to temper."
  • Best Subject: Kokugo (Japanese), Classics, World History
  • Worst Subject: None
  • Committee: Student council secretary
  • Often visited place in school: Library
  • Favorite Color: White
  • Favorite Food: He is not picky about food, but prefers the light-flavored
  • Favorite types of movies: Films produced by Ozu Yasujirou
  • Favorite type of books: Pure literature (especially Natsume Souseki's work)
  • Favorite type of music: Old Japanese court music
  • Favorite Type: A shrewd girl
  • Favorite date spot: Literature house
  • Most wanted thing right now: Japanese literature collection
  • Daily Routine: Read the morning and evening newspaper
  • Doesn't like/bad at doing: People who waste money and time
  • Special skill aside from tennis: Mental math, haiku, Go, Japanese chess, tea ceremony


Character TriviaEdit

  • When he was child, he once broke Inui's glasses, but was forgiven as he informed Inui and apologized immediately. 
  • Sometimes he comes to pick Kirihara up in the house because his junior often comes late to morning practice.

Other TriviaEdit

  • His birthday is one day after his childhood friend's, Sadaharu Inui, June 3rd.
  • He is the tallest member in Rikkaidai Tennis Club, but his shoe size is the smallest.
  • He and Nio Masaharu like similar types of girl.
  • He has an unusual reading speed, and is addressed as "The Walking Dictionary" in Rikkaidai.
  • His annual average amount of reading: 600 books.


  • (About Tennis) "All you have to do is hit the ball where the opponent can't reach it. That's all there is to it."


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