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|Japanese name:|| 羽田 浩司|
|English name:||Koji Haneda|
|Relatives:|| Shukichi Haneda (non-blood brother) |
Yasuharu Haneda (father)
Ichiyo Haneda (mother)
|First appearance:||Manga: File 947 (In a silhouette) / File 948 (first full-face appearance)|
|Appearances:|| Chapters: 6|
Kohji Haneda was a talented shogi player that his "not-related-by-blood" brother, Shukichi Haneda, deeply respected. By the time of his death he had won four shogi titles. Many had high hopes that Kohji would win all seven of the major shogi titles.
Seventeen years ago, he died under mysterious circumstances when in the United States participating in a chess tournament, a game he also enjoyed. Ai Haibara suggests that Kohji may have been murdered with APTX 4869 since a person with the same name appeared on the list of people killed by the poison. It has been discovered that Rum may have been involved with his death due to the dying message missing letters that could be arranged to spell "ASACA RUM".
Kohji's motto was "one should stick with one's original plan" (初志貫徹 shoshi kantetsu). The same motto was written on a fan that Shukichi now owns.
 Plot overview
Haibara remembers a list of people that the drug APTX 4869 was used on in the past. She says that all of the other APTX 4869 victims were confirmed dead, except Shinichi. On that list was a name, Kohji Haneda (羽田 浩司 ), which was not relevant to the readers at the time.
After Shukichi and Yumi's talk, Haibara asks Conan whether he knows the name Kohji Haneda. Conan answers that Kohji was a talented shogi player, but he died under mysterious circumstances when he went to the United States to participate in a chess tournament. Haibara recognizes the name Kohji Haneda as one that was on the list of people killed by APTX 4869.
Conan investigates on the internet and finds that someone has been uploading information on Kohji's death. Kohji went to the United States to participate in a chess tournament seventeen years ago. The night before the tournament, he was attacked by someone and died at a hotel where he stayed. The room was ransacked, and he resisted. The cause of death is unknown. On the same day and at the same hotel as him, a wealthy person named Amanda Hughes died as well. She was a big fan of Kohji. Unlike Kohji's room, Amanda's room was clean when she died. Amanda's bodyguard, Asaka, went missing and still can't be found. Agasa reveals that a similar murder has happened recently so they put the investigation on hold. After Conan and Subaru solve that case, they decipher the meaning of the missing letters on the mirror of Kohji's room. Kohji's dying message from 17 years ago was "ASACA RUM", so Rum may be involved in their deaths.
Since the dying message was "P T O N", the answer to it must contain all of the missing letters of "U MASCARA"
PUT ON MASCARA - P T ON = U MASCARA
U MASCARA - ASACA (for Asaka) = U M R
Which can be rearranged to make RUM
making the answer "ASACA RUM"
Kogoro is put in contact with a Soul Detective who wishes to reveal some information about the Kohji Haneda case. When Conan and Kogoro go to meet with him at a hotel they find him dead and that Masumi and Mary have mysteriously moved in to the next hotel room. Both Masumi and Mary seem to react to Kohji's name when Kogoro says it.
 Relationship analysis
 Shukichi Haneda
Shukichi is a non-blood brother of Kohji, either by adoption, marriage, or some other means. Shukichi deeply respected him and likely changed one of his name characters slightly to honor Kohji. However the story of their relation is unknown.
 Shuichi Akai
 Tsutomu Akai
 Masumi Sera
 Amanda Hughes
Amanda Hughes was a fan of Kohji and has been in contact with him. She was murdered the same day as Kohji, and evidences proves that she had been in his hotel room before the murder. Haibara suspects that it might have been their relationship that led to Kohji's death.
 Rumi Wakasa
It's hinted that there is a connection between her and the murders of Kohji and Amanda.
 Hyoue Kuroda
It's hinted that Kuroda might have been involved in the death of Kohji 17 years ago, as he was shown very pensive, looking at Kohji's death in an article.
 Name origin
Maybe the name Kohji Haneda (羽田 浩司 Haneda Kōji) comes from Yoshiharu Habu (羽生 善治 Habu Yoshiharu) and Kōji Tanigawa (谷川 浩司 Tanigawa Kōji), real-life shogi players.
Shukichi Haneda (羽田 秀𠮷 Haneda Shūkichi) may have changed his name slightly to honor the late Kohji Haneda. Kohji's given name is 浩司, and the first character's radicals are (氵 ノ 土 口). 土 is earth's do. Shukichi's given name is spelled 秀𠮷, with the final "kichi" kanji also including the radical for earth's do. This 𠮷 for kichi is a very rare variant; 99% of the time kichi is written as 吉 with 士 (man/samurai's shi) instead.
- In episode 129, furigana (Japanese reading aid) of his surname is Hada (ハダ ).
- Gosho Aoyama mentioned there was "red herring" in Volume 18, the same volume the list of APTX 4869 victims appeared in.
- A (so far unconfirmed) source gives the names of his father and mother as Yasuharu and Ichiyo, respectively.
 In other languages
|Language||Given Name||Family Name||Notes|
|Japanese||浩司 Kōji||羽田 Haneda/Hada|
|Chinese||浩司 Hàosī||羽田 Yǔtián|
Muneo (宗男) is a name of another victim in the Japanese and English versions.
 See also
|Developers||Atsushi Miyano • Elena Miyano • Shiho Miyano|
|Victims||Shinichi Kudo • Kohji Haneda • Amanda Hughes|
|Possible Victim||Mary Sera|
|Antidotes||Prototype antidote • Baijiu|
|Related Articles||Silver Bullet • Victim list • Case from 17 years ago • Black Organization|
|Rum arc topics|
|Main interest||Rum • Case from 17 years ago|
|Connections||Kohji Haneda • Asaka • Amanda Hughes • Tsutomu Akai|
|Related Articles||APTX 4869 • APTX 4869 Victim list • Rum arc timeline|
|Cases of interest||The Scarlet Return • Three First Discoverers • Haneda Kouji's death case • Soul Detective Murder Case • A song named ASACA • Burning Tent Murder Case|
- ^ a b Case Closed File 179 (Reference: File:English APTX list.jpg)
- ^ Shukichi was a 義理の兄 to Kohji: an adopted brother or step brother, rather than a blood brother.
- ^ a b c d e f g File 947: Motto (Volume 89)
- ^ a b c d File 948: The Clenched Scissors (Volume 89)
- ^ a b c d e f g File 952: In the Suspicious Next Room (Volume 90)
- ^ a b File 953: As If Connecting with a Demon in the Darkness (Volume 90)
- ^ File 949: Sweet Scent (Volume 90)
- ^ Let's Talk with Gosho Aoyama-sensei Day 2016
- ^ In episode 129
- ^ Italian Volume 18, File 179 (Reference: File:Italian APTX list.jpg)