Diamond no Ace Wiki
Kanemaru Shinji
Kanemaru act 2
Seidou High School - No. 5
Third Baseman
Bats: Right Throws: Right
Kanji 金丸 信二
Nickname Party Boy (祭り男 Matsuri Otoko) (by Toujou)

Kanemaaru (カネマール) (by Sawamura)
Supervisor from Hell (監視役員鬼 Kanshi Yakuin Oni) (by Sawamura)[1]
Kanee (カネー) (by Sawamura)[2]

Gender Male
Age 15 (debut)

16 (Chapter 207)

Date of birth 28 August
Place of birth Tokyo
Bloodtype A
Height 178 cm (5' 10")
Weight 68 kg (149 lbs)
Education 1st Year High School (debut)

2nd Year High School

Class 1-C (debut)


First Appearance
Manga Chapter 07
Anime Episode 03
Voice Actor Yoshitsugu Matsuoka (Japanese)
Sadly I'm used to being hit, so I'm not scared!
Kanemaru in Party Boys

Kanemaru Shinji is a second year student of Seidou High School. He is the roommate of Seto Takuma and formerly Takigawa Chris Yuu, and is a third baseman of the baseball team.


Kanemaru has blonde cropped hair and brown eyes. He often knits his eyebrows, which makes him looks grumpy most of the time.


He is self-confident and often behaves in a somewhat arrogant manner. Nevertheless, his teammates see him as a caring 'big brother' figure. He looks out for everyone as shown in the show when he is watching over Sawamura, often helping him study for exams. It's stated multiple times during the series that he is good at taking care of others, especially the new first years.

Kanemaru isn't the type to be openly bitter about things when it comes to his place on the baseball team. At the beginning of the series when he was not yet a first string player, he encouraged his teammates to do well in his place. In Act II, Kanemaru evolves to be the so-called "leader of the first years."

Act I[]

Before the Fall Tournament started, Kanemaru made it onto the first string but did not get to play in the first game. Committed to not get left behind by his fellow batch mates, Kanemaru makes good appeal for himself in batting practice by hitting Furuya's fastball. He made his high school debut in the second match against Nanamori High where he hits a 3-run RBI[3].

Kanemaru also played in the semifinal match against Seikou as a starting player. During one of the tight situations in the 8th inning, Kanemaru failed to make a catch to 3rd base and the error allowed a runner to make it safely to 1st. Despite making the error, he was encouraged by Sawamura, who was becoming tense himself.

Act II[]

At the start of the new year, Kanemaru takes it upon himself to take care after the new first years. As strict as he naturally is (Sawamura aptly calls him "supervisor from hell"[1]), everyone is pleased at how well he encourages the kouhai. He has became more of a regular starting player for the 3rd base position but bats in the bottom of the lineup.

He has experienced somewhat of a slump since spring and has been recording very few hits while getting struck out a lot in games.[4] Realizing that he is at risk of being laid off of the starting position, Kanemaru has since started to work hard on his batting in order to improve his batting.

After immense training and hard work during the off-season during practice games and the summer training camp, Kanemaru keeps his spot on the first string for the summer tournament and is given the number 5 jersey. This makes him immensely happy as he is shown to be thinking about his single-numbered jersey in class; he is jealous of the attention Sawamura is getting from their classmates after the jersey numbers are announced. He wishes for someone to also ask him about his spot on the team so he can talk about it.


Sawamura Eijun[]

At the beginning of the series, Kanemaru didn’t recognize Sawamura as a member of the team. He disliked him, believing the pitcher to be all talk, but as the series goes on he eventually begins to acknowledge him. As a classmate, Kanemaru is the one helping Sawamura with his studies to which Sawamura is grateful for, especially after he passed the final exams before the start of the Summer Tournament. As a teammate, Kanemaru often stands in the batter's box when Sawamura practice his pitches. He voluntarily helped out and was a great help when Sawamura suffered from the yips. He is rather strict during study and training sessions and doesn't sugarcoat his words because he wants Sawamura to discover his mistakes as fast as possible and keep on improving. In Act II, we see the relationship between the two continue to develop as Kanemaru is one of the players on field who show support for Sawamura, whether it be through smart remarks, supporting him with offensive plays, or celebrating with Sawamura when his pitches are in top form. We also see that Kanemaru is the first person Sawamura's reports to when he and Okumura first clash, showing Sawamura likes to confide in (or complain to) Kanemaru.

Toujou Hideaki[]

In junior high, the two of them played on the baseball team together. The two appear to be close friends and get along well. Toujou seems to like giving impromptu nicknames to Kanemaru, like "the party boy is showing up"[5] during their match against Yakushi. To help with Kanemaru's batting practice, Toujou would pitch fastballs to difficult locations as per Kanemaru's request to help him improve his batting. In their second year, when Toujou made his comeback as a pitcher in a practice match against Asari High, Kanemaru seemed to celebrate this fact by hitting a two-run RBI.

Takigawa Chris Yuu[]

Kanemaru was Chris's roommate. He initially took on the responsibility of helping Chris with ensuring that Sawamura kept his grades up so that he could remain on the team. Later, he began assisting Chris by standing in as batter for pitching practice, particularly after Sawamura fell victim to the yips.

Takatsu Hiroomi[]

Takatsu is one of Kanemaru's batchmates. He and Kanemaru appear to have a hostile relationship with each other; as noted by Toujou, the two seem to never get along.[6] Kanemaru does seem to have genuine care for Takatsu when the former gives him congratulations for making the first string, as well as warning him to not be too greedy with his position choices. Takatsu sees Kanemaru as a rival of sorts, envious of him getting on the first string so soon.

Yoshikawa Haruno[]

They are both in the same class, and have been since their first year along side sawamura and a 2nd year addition of Furuya. Kanemaru has a very friendly relationship with Haruno and tends to blush when speaking to her, and enjoys her presence when in a chaotic class with Sawamura and Furuya. He may have developed feelings for her but she seems to be unaware at the moment.


After getting into the first string, Kanemaru wants to remain as a first string player, and thus never slacks off in practice. He’s the type of person that knows that practice doesn't lie.

Kanemaru is very good with batting fastballs even as strong as Furuya's, and seems to have good slugging power. Kanemaru can easily score long hits to drive in runners and even score a home run on a fastballs, but his success with breaking pitches is poorer.[4] He seems to be good in clutch situations; however, his actual results are not as impressive as his skills suggests. In his second year, Kanemaru struggles to find consistency with his batting as he has very low contact rate - for instance, he got only two hits and three strike-outs at over ten at bats.[4] As a result, Kanemaru is not consistently on starting lineup, often being subbed in for Higasa.

Although he committed a few errors on defense in his first year, Kanemaru is usually solid when he defends at 3rd base. His defensive skills have much improved since his rookie year as he has became the starting 3rd baseman for Seidou in the Summer Tournament.

Player Statistics[]

This data is based on the official guidebook, it will only be changed if there is an official update!

Player Statistics
Note that just because a character said something about another characters improvements is not considered an official update!
You are free to write about the characters improvements in the Skills section above!
Physical Strength
Mental Strength


  • Favorite Food: Cheeseburger
  • Favorite Subject: English
  • He has respect for his father.
  • He was the roommate of Takigawa Chris Yu.
  • His hobby is music appreciation (lots of western music because of his father’s influence)
  • His favorite artists are "The Strokes" and "The Libertines".
  • His first official match was the match against Nanamori Gakuen (2nd round of of the Fall Tokyo Regional) [7]
  • He calls Sawamura "Wamura" when the latter is doing well in the field [8]
  • In his second year he is in the same class as Sawamura Eijun, Furuya Satoru, and Yoshikawa Haruno.[9]
  • His first hit when he was on the starting lineup for the first time was also his very first RBI.
  • According to Kawakami he is good at taking care of others.

Name Etymology[]

  • Kanemaru (金丸) - Money Circle
  • Shinji (信二) - Faithful Second (son)


  • "You aren't just the representative for the baseball club. You're a representative for all of us first years." - to Sawamura [10]
  • "He threw without hestitation. Right toward the coach's chest. What kind of heart does he have?" - about Sawamura[11]
  • "Deal with it, like a man!" about Sawamura [12]
  • "Read faster, cause it's my turn to borrow it next. And your face has spoilers all over it!!" - to Sawamura about shoujo manga [13]
  • "Sadly I'm used to being hit, so I'm not scared." - about Sawamura's pitching [5]
  • "You are such a man, Kanemaru." - Kariba [12]
  • "First and foremost, you’re stupid. You’re too emotional. Your pitch is slow. Your control isn’t very good yet. You try to hide it by sounding excited. You can’t do pick-offs. You get too carried away in class." - to Sawamura [14]
  • "Kanemaru, hear me out!" - "It's all your fault." - "But I didn't say anything yet!"[15]
  • "Finally a kouhai in my room as well ... I've been so waiting for this~ fufufu..."
  • "Lately, we've been having an influx of third baseman wannabes... I hate for people to think that everyone and their mother can play this position."



  1. 1.0 1.1 Act II - Chapter 21
  2. Act II - Chapter 70
  3. S2 - Episode 10
  4. 4.0 4.1 4.2 Act II - Chapter 79
  5. 5.0 5.1 Act I - Chapter 399
  6. Act II - Chapter 60
  7. Act I - Chapter 261
  8. Act I - Chapter 308
  9. Act II - Chapter 11
  10. Act I - Chapter 59
  11. Act I - Chapter 81
  12. 12.0 12.1 Act I - Chapter 224
  13. Act I - Chapter 258
  14. Act I - Chapter 298
  15. Act II - Chapter 25
  16. Act I - Chapter 224