Diamond no Ace Wiki
Hongō Masamune
Hongou anime
Komadai Fujimaki - No. 1
Bats: Right Throws: Right
Kanji 本郷 正宗
Nickname The big and strong youth of the North[1]
Baseball Godsend (by Nitta Kouzou)[2]
Young Beast[3]
Demon God[4]
Incumbent King[5]
The Emperor[6]
Gender Male
Age 17[7]
Date of birth 16 August
Place of birth Hokkaido
Education 2nd Year High School
Style Power Pitcher
Skills 150+ km/h Fastball
Split-finger Fastball
First Appearance
Manga Act II - Chapter 1
Anime Act II - Episode 1
Voice Actor Daisuke Ono
We came all the way from Hokkaido not to have fun playing baseball. We're here, at Koushien, to claim the Championship pennant. Like hell you Big City Wimps can ever stop us!
Hongou in Spring Snow [8]

Hongou Masamune is a second year student of Komadai Fujimaki High School. He is the ace of Komadai Fujimaki's baseball team and is touted as the young phenom pitcher of the Hokkaido Prefecture that is the best of his generation.


Hongou is a tall young man with a somewhat muscular build and is dubbed the big and strong youth of the North (北の怪童) by the media.[9]. He has short dark hair, dark blue eyes, and always has a gruff or uninterested look on his face.


Hongou has a serious, yet intense personality. He is confident, hates losing to anyone, and is often unfriendly or outright rude towards others, dismissing their opinions and advice. He shows resentment towards his coach Nitta and seems to dislike the media, feeling annoyed by them.


Hongou as a kid

When he was in Junior High, Hongou was already an impressive pitcher but on one day, he heard about Furuya Satoru, who pitches faster than he does. He and his close friend Renji wanted to play against Furuya in middle school but unfortunately, it didn't happen.[8] In his rookie year, he made his Koshien debut with his team and he was part of a pitcher relay that faced and beaten Narumiya Mei and Inajitsu in the Koshien Final, winning his first Koshien Championship in his rookie year.

Hongou and Renji see Furuya

By Fall, Hongou has became the Ace of Komadai and along with his team qualified for the Meiji Jingu, supposedly winning the Hokkaido Prefecture's Fall Tournament. Hongou and Renji got to see Furuya in action during the Meiji Jingu and also expected to play against him in the Final but again missed the chance after Seidou lost in the Semifinal to the eventual runner-up Houmei High.[10] Hongou and Komadai ends up beating Houmei High in the Final to win the Meiji Jingu Championship for a back to back Major Tournament win.


Act II[]

(84th)Spring Koshien[]

Hongou's first appearance

Hongou is first seen reading a book in the hotel while his teammates watch the telecast of Seidou's first round match. A teammate asks him if he finds the book more interesting than the match. Before he can answer, their coach, Nitta Kouzou, enters to give instructions and tells Hongou that he'll be the relief pitcher in their upcoming match which really ticks him off, to be a reliever despite being the Ace of the team.

Hongou dominates his opponent

In Komadai's first round match, in the bottom of the fifth, Komadai leads with two runs and Hongou is sent to the mound. While Hongou is getting ready to pitch, he remembers the countless of questions of the media, his coach berating him for not being more approachable and generally people who kept on telling him what to do, as well as asking him personal questions. Hongou vents out his anger by quickly dispatching 3 batters to end the inning, despite this, Coach Nitta scolds him at the dugout for getting too worked up against the bottom of the lineup to which Hongou gets angry at but is held back by catcher, Renji.


Hongou Fastball
Hongou demonstrating both his command and power in one impressive pitch

In the match against Seidou High, Hongou starts for the first time in the tournament. He throws a 150km/h fastball right off the bat at Kuramochi and strike-out Seidou's lead-off with his Splitter. He then proceeds to strike-out both Toujou and Haruichi with just three pitches each, [11] thereby recording an immaculate inning.[12] Hongou then continues to shut Seidou down, after his team scored two early runs off Furuya.

Hongou strikes out Furuya

At the top of the fifth, Seidou High is yet to make a hit. At-bat is Furuya and Hongou vents out his frustrations, striking Seidou's ace out.[8] At the top of the seventh, Miyuki gets the first hit off Hongou. Furuya bats next sending the ball between first and second. Miyuki advances to second but Furuya is out at first thanks to Komadai's captain's fine play. The captain, Nishi Hideo, apologizes to Hongou for failing to get the double play, Hongou points a thumb to himself then turns away. [13] And at the top of the ninth, Hongou cleanly closes out the game handing the win to his team, delivering Seidou a complete game Shut-out.

At the line-up, Furuya offers to shake hands with Hongou and despite being reminded by Renji, Hongou walked away, disregarding the gesture.


In the semi's versus Hakuryuu, Hongou did not pitch but Hakuryuu's lineup is shut down to five hits.


In the finals, Komadai faces Seiseisha. From a newspaper article, Hongou displays masterful pitching, raking up 12 strikeouts while holding Seiseisha to only 3 hits and delivered yet another Shut-out victory. He also impresses with his batting and Komadai wins their third major tournament.[14][15]


After having watched the match between Seidou High and Inashiro Industrial, in which Seidou High won 2-1, and therefore, won the West Tokyo Tournament finals, Hongou's teammates admit that Seidou High is definitely stronger now than they were at Senbatsu, pointing out the Pitcher Sawamura's performance who is good enough to relegate Furuya Satoru to a reliever. Hongou, unimpressed, said that he'll just have to crush Sawamura as well. Catcher Renji points out to Hongou that he just smiled when he said that, but Hongou denies it, to which Renji tells him that he did and that there is nothing wrong with smiling.[16][17]


To take all of those feelings and express them through his pitching. An ability in a league on its own. Truly. He is a baseball godsend.
Nitta Kōzō on Hongou's pitching
Hongou splitter
Striking out Toujou with a Splitter

Hongou is a power pitcher, being able to throw fastballs reaching 150 km/h and topping out at 151km/h. He has a pitching style that accumulates an amazing amount of strikeouts. Hongou's arsenal includes the Slider and his well-known winning pitch, the Splitter which is nigh unhittable due to how much it looks like a fastball and the amount of sinking action it has near the plate.[7] Hongou was said to possess exceptionally good control for a power pitcher, capable of locating his pitch to inside and outside corners easily right from the starting inning.[11] Unlike Furuya who relies primarily on fastball, Hongou mixes up between the Fastball and the Splitter frequently and to devastating effect and he doesn't shy away from revealing the breaking pitches early to the lead-of runner. Hongou has the stamina to pitch for 9 innings. Perhaps Hongou's greatest strength is his high intensity which allows him to stay focus right from the start and his ability to channel his frustration to enhance his pitching. It is said that the more stress he builds up the better he performs.[8] Different from other pitchers who may have moments of weakness throughout the course of a game, Hongou is able to maintain his high intensity throughout a full game, constantly staying focused while not overconfident which allows him to raise his already high level repeatedly as the game continues. Contrary to his violent attitude, his pitching is always brilliant and even in a pinch, he does not get upset.


  • Hongou is said to have pitched toe to toe against Narumiya Mei in the Koshien Final in his first year. [18]
  • His pitch speed was in the high 140s in his first year. He topped out at 151 km/h in Senbatsu and has been consistently hitting 150 km/h and over in his second year. [18]
  • Hongou is the first pitcher in the series to be shown recording an immaculate inning[12], an exceedingly rare feat in baseball, by striking out all 3 batters from Seidou within 9 pitches in the 1st inning of the Senbatsu Quarterfinal.[11]
  • Hongou did not lose a single run en route to winning the Spring Koshien title.
  • Judging from the cover page that was used in the chapter "Concord" in Act II, and his reputation in the story, Hongou seems to be positioned as the strongest pitcher in the high school baseball world of Diamond no Ace.[19]
    • In the chapter "Endless Road" in Act II, Sawamura thought about the amazing pitchers he has encountered, and Hongou was positioned at the top, above everyone else, even Narumiya.[20]



  • Every last one of you...Just shut the hell up! It's me who's playing baseball! And it's me who's throwing the pitches! So you stupid sideliners need to keep your damn traps shut! [18]
  • Have you ever seen a white ball rolling across the pure white snow? Have you ever seen the Demon of a man who has sold his soul to baseball? We came all the way from Hokkaido not to have fun playing baseball. We're here, at Koushien, to claim the Championship pennant. Like hell you Big City Wimps can ever stop us! - Hongou to Furuya [8]
  • Masamune's talent is bottomless...And for the sake of this boy's growth, I will gladly play the devil. - Nitta Kouzou about Hongou [21]
  • That damn old geezer...Who thinks he's hot stuff?! Who said anything about being satisfied?! I haven't had nearly enough yet! If you say there's anyone who can stop us, bring him! [22]


  1. Act II - Chapter 4
  2. Act II - Chapter 5
  3. Act II - Chapter 2
  4. Act II - Chapter 2
  5. Act II - Chapter 6
  6. Act II - Chapter 7
  7. 7.0 7.1 Act II - Chapter 2
  8. 8.0 8.1 8.2 8.3 8.4 Act II - Chapter 6
  9. Act II - Chapter 4
  10. Act II - Chapter 6
  11. 11.0 11.1 11.2 Act II - Chapter 5
  12. 12.0 12.1 An immaculate inning occurs when a pitcher strikes out all three batters he faces in one inning, using the minimum possible number of pitches - nine. The strikeouts can either be of the swinging or the caught looking variety, and there can be foul balls involved. The purest form of the feat would be to have nine swings and misses. The name for the feat only came into widespread use in the 21st century. Once exceedingly rare - there were none between 1929 and 1952 - immaculate innings began to be more common starting in the 1990s and the evolution in the usage of relief pitchers that led to most such pitchers being used for one inning only. During that inning, they can throw as hard as possible, knowing they do not need to keep anything in reserve.
  13. Act II - Chapter 7
  14. Act II - Chapter 11
  15. Komadai has previously won the 89th Summer Koshien and the Meiji Jingu.
  16. Act II - Chapter 306
  17. Komadai is impressed with Seidou High's performance and Sawamura seems to have sparked Hongou's interest.
  18. 18.0 18.1 18.2 Act II - Chapter 2
  19. Act II - Chapter 7
  20. Act II - Chapter 256
  21. Act II - Chapter 5
  22. Act II - Chapter 64