Mizukami hails from Ōsaka. As a child, he was a prodigy at shōgi and was on track to become a professional player until middle school.[1] He was eventually scouted by Border.[2]

Introduction ArcEdit

Ikoma Unit presumably takes part in the extermination of all Rads in Mikado City.[3]

Large-Scale Invasion ArcEdit

Ikoma Unit is seemingly not deployed during the Second Large-Scale Invasion, and could therefore be among the B-rank units with missing members which Masafumi Shinoda prevents from fighting against Aftokrator's forces out of fear of capture.[4]

B-Rank Rank Battles ArcEdit

Round TwoEdit

On February 5,[5] Ikoma Unit faces off against Ninomiya Unit in the second round of rank battles.[6] Since Azuma Unit, Katori Unit, Ōji Unit and Yuba Unit[7] compete in a four-way match in the day division,[5] it can be inferred that the three-way battle takes place in the night division and that Kageura Unit is the third participant.

Round FourEdit

Since Tamakoma Second fights Ninomiya Unit, Kageura Unit and Azuma Unit in the night division of rank battles on February 15,[8] and since Katori Unit and all other possible opponents were in the middle tier of B-rank or lower,[9] Ikoma Unit must have fought in the day division against Ōji Unit and Yuba Unit. After the scores from both divisions are tallied, Ikoma Unit remains in third place.[10]

Galopoula's BlitzEdit

Since Azuma Unit, Kageura Unit and Yuba Unit fight in the night division of rank battles on February 19,[11] Ikoma Unit must have competed in the day division against Ninomiya Unit, Ōji Unit and Suzunari First. They rank third at the end of the match.[12] That same night, Ōji Unit and Ikoma Unit are deployed to intercept opponents west and south of the base in preparation of Galopoula's incursion.[citation needed]

Round Five (Night)Edit

After the results of both the day and night divisions are tallied in round five, Ikoma Unit ranks third, with 27 points.[13]

Round SixEdit

Ikoma Unit is pitted against Ōji Unit and Tamakoma Second in round six. On the day of the match, the team members are gathered in the strategy room, discussing Tamakoma Second's prowess. Mizukami is particularly worried by the wire strategy. After Kōji Oki points out that Maori Hosoi seems to resent not being complimented, Mizukami joins Tatsuhito Ikoma and Kai Minamisawa in singing her praise. He then reviews how they can counter Chika Amatori's Lead Bullet, and tasks Oki with taking her out.[14] The conversation moves to the menu of the cafeteria until the start of the match.[15]

Mizukami spawns in the western portion of Cityscape A and quickly meets up with his captain. When Yutaka Kashio dons a Bagworm, Mizukami surmises that he must be looking for Chika or Osamu Mikumo, who is also off-Radar, so he warns Minamisawa about the possibility of a sneak attack.[16] As Minamisawa engages Kashio, Ikoma and Mizukami start heading towards him, but he bails out before they can reach him.[17] Ikoma launches his signature Senkū attack, which all of Ōji Unit and Yūma Kuga survive. Mizukami thinks it a fluke and tells him to try again, but they all dodge again and Yūma escapes. At Ikoma's behest, Mizukami targets Kazuki Kurauchi with a Hound volley disguised as Asteroid, although Kazuaki Ōji sees through his deception and warns his teammate in time. The Shooter is however beheaded by Yūma with a sneak attack, so Ikoma and Mizukami shift their attention to Yūma. When Chika takes a shot at them, they pressure Oki into making more of an effort.[18]

It is not long before the Sniper is found by Ōji, so Ikoma and Mizukami make their way towards him while fighting Yūma.[19] As both the Tamakoma Second ace and Chika reach the wire zone, she proceeds to raze the buildings around Ikoma and Mizukami, who follow their target into their turf.[20] Mizukami recommends attacking from a distance as they cut down the wires until Oki snipes Chika. However, he is hit by her Lead Bullet when Yūma stuns him with a piece of debris, and immediately beheaded by Ōji's sneak attack.[21] The match terminates not long afterwards, with Ikoma Unit and Ōji Unit scoring three points against Tamakoma Second's four.[22] After the results from both the day and night division are tallied, Ikoma Unit remains in third place with a point total of 34.[23]

Round SevenEdit

Since Tamakoma Second faces off against Kageura Unit, Azuma Unit and Suzunari First in the day division of rank battles on March 1,[24] it can be inferred that Ikoma Unit competes against Ōji Unit and Ninomiya Unit in the night division. After the results of both the day and night divisions are tallied, Ikoma Unit ranks fourth.[25]

Round EightEdit

On March 5,[26] Ikoma Unit is pitted against Ninomiya Unit, Tamakoma Second and Yuba Unit in the night division of rank battles. The fighters are as relaxed as ever, listening to Ikoma's rambling stories.[27] Mizukami spawns in the center-northern area of Cityscape B. As he begins to move eastward, his attention is soon caught by a bombardment in the west, which he supposes to be Masataka Ninomiya's doing.[28] The trion signature on which members of multiple teams converge disappears, but Oki is able to spot its owner, Hyuse, and they decide to target him.[29] As Takuma Yuba, Yukari Obishima and Sumiharu Inukai also join the fray, Mizukami monitors the fight while keeping Hyuse penned in.[30] He is briefly distracted by a massive explosion caused by Chika's Meteor misfiring. Hyuse manages to hold off the close-ranged fighters, but Inukai and Mizukami stop him in his tracks as he attempts to flee.[31] Mizukami is surprised by Hyuse's presumed Asteroid turning out to be Viper and forcing Ikoma to bail out. The remaining bullets turn towards Minamisawa, but Mizukami shields him, so he is able to deliver the final blow. As Hyuse bails out, Mizukami finds himself pincered by Yuba and Inukai. Unable to guard against both their attacks, he is defeated by the enemy captain.[32] When Oki snipes Kazuto Tonooka, Mizukami protests that he could have used his skill to help them, but the Sniper replies that everyone else was ready to defend.[33]


  1. Volume 18 Character Profiles
  2. Daisuke Ashihara: Q130: Who are the main agents who were scouted from out of the prefecture? (multiple) A: Suzunari First’s Murakami, Taichi, Kon, Tachikawa Unit’s Kunichika, Ikoma Unit's members etc.
    Source: Border Briefing File, Question 130
  3. World Trigger Manga Chapter 11
  4. Daisuke Ashihara: Q252: Why couldn’t upper B-ranks like Ninomiya Unit or Kageura Unit participate in the Large Scale Invasion? Did they travel far away on their time off? (multiple) A: It seems I lost the chance to draw it in the story itself so I’ll write it here: "HQ Chief Shinoda gave the order that B-rank and lower agents are not allowed to participate in the fight until all members of the team are present." It seems he was worried about agents acting on their own and getting captured by Rabbits. Of course, there are also teams like Kako Unit who was late to the fight because their captain went out on a drive on her time off.
    Source: Border Briefing File, Question 252
  5. 5.0 5.1 World Trigger Manga Chapter 94
  6. World Trigger Manga Chapter 184 (p. 6)
  7. World Trigger Manga Chapter 173 (p. 5)
  8. World Trigger Manga Chapter 105 (p. 18)
  9. World Trigger Manga Chapter 103 (p. 12)
  10. World Trigger Manga Chapter 115 (p. 13)
  11. World Trigger Manga Chapter 123
  12. World Trigger Manga Chapter 146 (p. 14)
  13. World Trigger Manga Chapter 150 (p. 5)
  14. World Trigger Manga Chapter 150
  15. World Trigger Manga Chapter 151
  16. World Trigger Manga Chapter 152
  17. World Trigger Manga Chapter 153
  18. World Trigger Manga Chapter 154
  19. World Trigger Manga Chapter 155
  20. World Trigger Manga Chapter 156
  21. World Trigger Manga Chapter 157
  22. World Trigger Manga Chapter 158
  23. World Trigger Manga Chapter 161
  24. World Trigger Manga Chapter 164
  25. World Trigger Manga Chapter 184 (p. 3)
  26. World Trigger Manga Chapter 183
  27. World Trigger Manga Chapter 184
  28. World Trigger Manga Chapter 185
  29. World Trigger Manga Chapter 186
  30. World Trigger Manga Chapter 187
  31. World Trigger Manga Chapter 188
  32. World Trigger Manga Chapter 189
  33. World Trigger Manga Chapter 190


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