Diamond no Ace Wiki
Shirasu Kenjirō
Seidou High School - No. 9
Right fielder
Bats: Left Throws: Right
Kanji 白州 健二郎
Nickname Flying Squirrel (モモンガ Momonga) (by Sawamura)

Silent Killer (by Sawamura)

Gender Male
Age 17 (debut)

18 (current)

Date of birth 23 April
Place of birth Tokyo
Bloodtype AB
Height 176 cm (5' 9")
Weight 66 kg (145 lbs)
Education 2nd Year High School (debut)

3rd Year High School (current)

First Appearance
Manga Act I - Chapter 51
Anime S1 - Episode 18
Voice Actor Yoshiyuki Shimotsuma
His play-style is not flashy by any means but rock-solid.
Toujou Hideaki about Shirasu

Shirasu Kenjirou is a student of Seidou High. He is a right fielder of Seidou's baseball team. He has been a regular since the Spring Tournament of Act I, and he is the former roommate of Kadota Masaaki.


His low-key personality hides his fighting spirit within. He is described as calm and consistent by Wakabayashi Gou. Shirasu knows when to sacrifice himself for the team.

Relationship with other characters[]

Kuramochi Youichi[]

After confirming Miyuki's injury Kuramochi approaches Shirasu first and they both prioritize Miyuki’s well-being and vowed to stop him if it all goes wrong, even if it means diminishing their chances of winning the tournament and make Kataoka stay as their coach.

Miyuki Kazuya[]

Shirasu acknowledges Miyuki's skills as the "pivotal part of the team". After Kuramochi told him about Miyuki's injury[1] he realised anew how much Miyuki's existence means for the team and that they took his abilities granted way too much. He describes Miyuki as someone you can't imitate no matter how hard you try, because he is the captain, the fourth batter and someone who participates in one match after another (that alone is something really amazing).[2] Shirasu (and Kuramochi) were clearly worried about Miyuki during their match against Yakushi High School.[3]


Shirasu is known as a reliable defender. He can see through batters' defining features and adjusts his position in defense accordingly. Harada had described Shirasu as the most balanced hitter in Seidou's lineup, having great speed while also being able to hit for power.

Player Statistics[]

Physical Strength
Mental Strength
  • Note: After the Summer Tournament, 21-7 Batting average .333[4]


  • Favorite Food: Oden
  • Favorite Subjects: Politics and Economy
  • Hobbies: calligraphy 4 dan and music
  • Players he admires: Ichiro Suzuki.
  • He is best friends with Kawakami.[5]
  • Rankings from the guidebook:
    • He ranks third in Outfield defense.
    • He ranks fourth at Bunting.
    • He ranks fifth in having the best Batting Eye.
  • Sawamura compares him with a flying squirrel.[6]

Name Etymology[]

  • Shirasu (白州) - White Province
  • Kenjirou (健二郎) - Healthy Second Son


  • "Wow! I saw something totally awesome! From up close!" - Sawamura[2]
  • "It's reassuring to know he's defending behind you because you can't find a person more reliable."[7]
  • "He's someone to look up to as an outfielder." - Toujou[6]
  • "When I heard Kuramochi say it, it dawned on me anew... just how much that guy's existence means for our team. "If it's him, he can do it." "If it's him, he can hit it." And never once had it occurred to us that we took him and his abilities for granted way too much. If Miyuki can't continue playing in this match... Participating in one match after another. Just that alone is already something amazing. Not to mention he's the captain and fourth batter now. Someone you can't imitate no how hard you try... At the very least, I want to show my gratitude trough contributing with my play." - about Miyuki [2]
  • "In the fall of my first year... Two players my age got chosen as regulars before me, and it never stopped bothering me ever since. Not a day went by without me thinking about how much I don't want to lose to them." - about Miyuki and Kuramochi[8]


  1. Act I - Chapter 365
  2. 2.0 2.1 2.2 Act I - Chapter 373
  3. Act I - Chapter 359-410
  4. Act I - Chapter 205
  5. Act I - Chapter 257
  6. 6.0 6.1 S2 - Episode 42
  7. Act I - Chapter 374
  8. Act II - Chapter 208