HiroseKoichi jojoeoh

HiroseKoichi EchoesAct1 jojoeoh

HiroseKoichi EchoesAct2 jojoeoh

HiroseKoichi EchoesAct3 jojoeoh

You are much more cowardly than a normal person and easily give in under pressure, but when push comes to shove you can be quite courageous.
~ Rohan Kishibe describing Koichi


Koichi Hirose is a major character in JoJo's Bizarre Adventure Part IV: Diamond is Unbreakable. He is a high-school freshman that, while involuntarily, gets involved in the bizarre happenings in Morioh with Josuke Higashikata and Jotaro Kujo. He eventually becomes a huge part in tracking down serial killer Yoshikage Kira.

Power and Stats

Tier: 10-B. 10-C with ACT1 | Varies with ACT2 | Unknown with ACT3

Name: Koichi Hirose

Origin: JoJo's Bizarre Adventure (Part IV: Diamond is Unbreakable)

Gender: Male

Age: 15 in Part IV. 17 in Part V.

Classification: Human, Stand User, Student

Powers and Abilities: Sound Manipulation with Echoes, Superhuman Speed and Density Manipulation with Echoes ACT3

Attack Potency: Human level. Below Average Human level with ACT1 (Tamami Kobayashi remarked on how its attacks don't hurt) | Varies with ACT2 (Any phrases or kanji made by Koichi could yield many possible results when activated.) | Unknown with ACT3 (Its ability doesn't require it to use any known physical prowess)

Speed: Peak Human with Massively FTL reactions. Normal Human with ACT1 (Tamami Kobayashi remarked how even he could dodge its attacks). | Subsonic with ACT2 (Can move at speeds faster than the eye). | Massively FTL with ACT3 (Tagged Black Sabbath before it stabbed Giorno, which was stated to be faster than Gold Experience).

Lifting Strength: Likely Peak Human. Unknown with Echoes

Striking Strength: Human Class. Human Class with ACT1 | Unknown | Unknown

Durability: Wall level (Survived being elbowed and shot through a metal door). Unknown with ACT1 | Wall level with ACT2 (Was being damaged by Yukako's Love Deluxe) | City Block level+ with ACT3 (Took hits from Killer Queen and got back up)

Stamina: Superhuman, can last a few minutes after being punched through the gut by Killer Queen.

Range: 50 meters with ACT1 | 50 meters with ACT2 | 5 meters with ACT3

Standard Equipment: Echoes ACTs 1-3

Intelligence: Above Average

Weaknesses: ACT1 can be broken by someone with enough willpower. ACT2 and ACT3 can only put down one kana at a time. Echoes 3 Freeze lasts only if the target remains within 5 meters of ACT3. Any damage done to either ACTs will reflect back onto Koichi.

Notable Attacks/Techniques:

  • Echoes: Koichi's Stand. Rare among Stands, Echoes has three distinct forms called "ACT"s that he may call upon alternatively. ACT1 is a small, reptilian-like Stand with a large head, small arms, long tails, and wheels as "legs".  ACT2 is somewhat the same, but it has a small body with legs, and a longer tail. ACT3 is completely different, being a short, green-and-white humanoid Stand with vulgar vocabulary.
    • Sound Maker: Echoes ACT1 can write a sound effect in Katakana on anything, from human flesh to the ground, and have that sound repeat itself over and over with increasing volume. Echoes can shoot sound effects from both its tail and hands. This ability seems to allow it to also transfer words
    • Sound Maker (ACT2): Echoes' second form increases its sound abilities beyond its first form's capabilities. When the kana is written on an object, touching it activates the effect of the sound (ex. if the sound word hyoo ("whoosh") is written, it creates a gust of wind with increasing force)
    • Echoes 3 Freeze: ACT3 rapidly punches its target before attributing a "freezing" or stopping effect by greatly increasing their effective weight by around 40 - 50 kilograms (100 - 105 lbs.). This works when ACT3 rhymes "Three" with "Freeze", thought it's not explained very well.

Key: ACT1 | ACT2 | ACT3


Notable Victories:

Notable Losses:

Inconclusive Matches:

Start a Discussion Discussions about Koichi Hirose

  • Koichi Hirose versus Scaramouche

    12 messages
    • Nope 8-B. The scaling being pulled over now actually. He would be low end unfortunately.
    • Well thats unfortunante, Koichi is still pretty swole to be 8-B tho. I would give it to Koichi then in round 3 then no way Scat man is gett...
  • Koichi Hirose's Revision

    4 messages
    • TheJ-ManRequiem wrote:I plan on updating plenty of the profiles , waiting on my calculation to be evaluated first before that . I got a ...
    • Yeah I'm quickly reading the manga again . Notice a few problems already , like secco being in accurate , among other profiles on top...