Koji Sekine

For other characters with the same first name, see [Koji](/wiki/Koji "Koji").
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| **Koji Sekine** | |
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| **Profile** | |
| Japanese name: | 関根 康史   (Sekine Kōji) |
| Age: | 2X |
| Gender: | Male |
| Occupation: | Cameraman   Professional karuta player |
| Status: | Alive |
| **Statistics** | |
| First appearance: | Movie: [Movie 21](/wiki/The_Crimson_Love_Letter "The Crimson Love Letter") |
| Appearances: | Movies: (/wiki/The_Crimson_Love_Letter "The Crimson Love Letter") |
| **Actors** | |
| Japanese voice: | [Daisuke Miyagawa](/wiki/index.php?title=Daisuke_Miyagawa&action=edit&redlink=1 "Daisuke Miyagawa (page does not exist)") |
| English voice: | [Jon Allen](/wiki/index.php?title=Jon_Allen&action=edit&redlink=1 "Jon Allen (page does not exist)")[](#cite_note-1) |
| First name can also be romanized as Kōji, Kohji or Kouji. | |
**Koji Sekine** (関根 康史 ,*Sekine Kōji*[?](/wiki/Help:Japanese "Help:Japanese")) is a character in the movie franchise *[Detective Conan](/wiki/Detective_Conan "Detective Conan")*. He is a suspect in [movie 21](/wiki/The_Crimson_Love_Letter "The Crimson Love Letter").
## Contents
* [1 Background](#Background)
* [2 Personality](#Personality)
* [3 Appearance](#Appearance)
* [4 Appellations](#Appellations)
* [5 Plot overview](#Plot_overview)
* [6 Relationships analysis](#Relationships_analysis)
+ [6.1 Toshiya Yajima](#Toshiya_Yajima)
+ [6.2 Heiji Hattori and Conan Edogawa](#Heiji_Hattori_and_Conan_Edogawa)
+ [6.3 Kensuke Achiwa](#Kensuke_Achiwa)
+ [6.4 Shikao Nagoro and the Nagoro-Kai](#Shikao_Nagoro_and_the_Nagoro-Kai)
* [7 Trivia](#Trivia)
* [8 In other languages](#In_other_languages)
* [9 References](#References)
* [10 See also](#See_also)
## Background[[edit](/wiki/index.php?title=Koji_Sekine&action=edit&section=1 "Edit section: Background")]
Koji Sekine is a young man living in the Kyoto region. He works as a cameraman and is a professional karuta player. Formerly affiliated with the Nagoro-Kai (名頃会), an elite karuta club with only twenty members, he moved to the much larger Satsuki-Kai (皐月会) when his mentor Shikao Nagoro disappeared. He went on to reach the finals of the Satsuki Cup (皐月杯争奪戦), but lost each time to the current champion Toshiya Yajima. He is the organizer for the annual lottery of the Satsuki-Kai.
## Personality[[edit](/wiki/index.php?title=Koji_Sekine&action=edit&section=2 "Edit section: Personality")]
Koji is an intelligent and calculating man, as he is able to pull himself out of the dangerous position of being framed for Yajima's murder quickly and even thinks of providing himself with a fake alibi and not to say too many details. However, when he gets cocky, he can slip out easily and then feels cornered. When he feels stressed, he walks around in circles. He has a snarky personality, but likes to put an innocent face.
He speaks in the [Kansai dialect](http://en.wikipedia.org/wiki/Kansai_dialect "wikipedia:Kansai dialect").
## Appearance[[edit](/wiki/index.php?title=Koji_Sekine&action=edit&section=3 "Edit section: Appearance")]
Character design.
Koji is a tall slim man with a distinctive big pointy nose and short sassy blonde hair. He is seen wearing suits, the first being a relaxed-style grey jacket with a green shirt and blue pants without a necktie. On the second occasion, for the tournament, he wears a more formal tan suit with a grey shirt and a black necktie. His shoes are black.
## Appellations[[edit](/wiki/index.php?title=Koji_Sekine&action=edit&section=4 "Edit section: Appellations")]
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| Picture | Name | What they call Koji Sekine | What Koji Sekine calls them |
| --- | --- | --- | --- |
|  | [Kensuke Achiwa](/wiki/Kensuke_Achiwa "Kensuke Achiwa") | Sekine-kun | President (*Kaichō*) |
|  | [Toshiya Yajima](/wiki/Toshiya_Yajima "Toshiya Yajima") | - | Yajima |
| Picture | Name | What they call Koji Sekine | What Koji Sekine calls them |
| --- | --- | --- | --- |
|  | [Kogoro Mouri](/wiki/Kogoro_Mouri "Kogoro Mouri") | Sekine-san | - |
|  | [Heiji Hattori](/wiki/Heiji_Hattori "Heiji Hattori") | Sekine | - |
var DCTabsJsId = "537159b9cd18e32db0d4df285081705f"
## Plot overview[[edit](/wiki/index.php?title=Koji_Sekine&action=edit&section=5 "Edit section: Plot overview")]
During a TV program by [Nichiuri TV](/wiki/Nichiuri_TV "Nichiuri TV") featuring Kogoro Mouri and Kensuke Achiwa, Toshiya Yajima, the third guest star, fails to arrive, but because the people at the station are unaware that he was just killed, they call in Sekine to be his replacement, since he is also a big figure in the karuta world. In the meanwhile, Sekine who went to confront his rival finds his dead body and panicks, so he decides to hide his involvement in the discovery of murder and shuts his phone off. Later in the evening, he arrives again at Yajima's mansion in the same clothes he was wearing when he discovered the body, which is a blunder since the police could have investigated his clothing. There, he meets [Fumimaro Ayanokoji](/wiki/Fumimaro_Ayanokoji "Fumimaro Ayanokoji"), Conan, Heiji, Kogoro and Achiwa and asks them what happened and pretends that he was drunk and did not power on his phone, which was why he could not be reached. This first encounter raises Conan and Heiji's suspicions. Later, Conan and Heiji using sleeping Kogoro corner Yajima in a room in Hotel New Otani and confront him regarding his involvement with Yajima's murder. He does not have an alibi, has a rivalry with Yajima and most of all said by accident that Yajima was beat to death even though there would be no way for someone that just arrived to know that the sword could not be used. He manages to get away when a staff member asks him to finish some preparations. The next day, when the convoy consisting of Achiwa's, Momiji and Iori's and Sekine's cars move towards the site of the tournament, the culprit blows up the bomb he had placed under his car. Sekine miraculously survives the explosion, but is in a critical state. Furthermore, the culprit had sent an email to him prior to the crime, with one of Nagoro's favourite karuta cards attached to it. A few days later, Sekine wakes up and is tended to by a nurse.
## Relationships analysis[[edit](/wiki/index.php?title=Koji_Sekine&action=edit&section=6 "Edit section: Relationships analysis")]
### Toshiya Yajima[[edit](/wiki/index.php?title=Koji_Sekine&action=edit&section=7 "Edit section: Toshiya Yajima")]
Koji finds Yajima's body.
Toshiya Yajima is Koji's main rival and both have been fighting for a while to win the title of karuta champion. However, he has always lost to and this has led to him having some resentment towards the former. The fact that Yajima was an avid critic of Nagoro also fuels this rivalry, but now that Yajima is dead, he might have a chance at winning the Cup.
### Heiji Hattori and Conan Edogawa[[edit](/wiki/index.php?title=Koji_Sekine&action=edit&section=8 "Edit section: Heiji Hattori and Conan Edogawa")]
From the moment they met, Heiji and Conan have had suspicions on him and tried to corner him about it. He tried to hide it even with all the evidence and this has led to a relation turned sour between both parties. It is unknown if they made up after the case.
### Kensuke Achiwa[[edit](/wiki/index.php?title=Koji_Sekine&action=edit&section=9 "Edit section: Kensuke Achiwa")]
Kensuke Achiwa seems to have a friendly relationship at first glance with Sekine, calling Sekine-kun, inferring to a student-teacher type relationship, but in fact, Achiwa was using him, unbeknownst to the karuta player. He was targeted merely for his contrived plan even though Achiwa had no vendetta against Sekine. Him discovering Yajima's body probably prompted Achiwa even more to get rid of him.
### Shikao Nagoro and the Nagoro-Kai[[edit](/wiki/index.php?title=Koji_Sekine&action=edit&section=10 "Edit section: Shikao Nagoro and the Nagoro-Kai")]
[Shikao Nagoro](/wiki/index.php?title=Shikao_Nagoro&action=edit&redlink=1 "Shikao Nagoro (page does not exist)") was the teacher and mentor of Sekine. He has a big amount of respect for Nagoro, but eventually moved on to Satsuki-Kai five years ago. He and Momiji are the only students of Nagoro to switch clubs. Moreover, the snarky and snobbish personality of Sekine seems to have been on par with Momiji and Nagoro's personalities.
## Trivia[[edit](/wiki/index.php?title=Koji_Sekine&action=edit&section=11 "Edit section: Trivia")]
* Koji's last name Sekine (関根) means "gate" (関) and "root/foundation" (根). It is the 216th most popular surname in the country and is most popular in the central western area of the country, but is uncommon in the Kyoto region.[](#cite_note-2) His first name stands for "health/peace" (康) and "record/history" (史). It has different possible readings, the most popular being Yasushi. Other readings include Yasufumi and Kōshi.[](#cite_note-3)
* He is voiced in Japanese by famous actor and comedian Daisuke Miyagawa, who was announced in February 2017, two months before the film's release.[](#cite_note-4) Miyagawa himself comes from the Kyoto region and speaks the Kansai dialect.
* Before being destroyed, his car was a white Toyota Corolla Axio [E140].
## In other languages[[edit](/wiki/index.php?title=Koji_Sekine&action=edit&section=12 "Edit section: In other languages")]
| Language | Given Name | Family Name |
| --- | --- | --- |
| Catalan | Koji | Sekine |
| Chinese (Simplified) | 康史 Kāngshǐ | 关根 Guāngēn |
| Chinese (Traditional) | 康史 K'angshih | 関根 Kuanken |
| English | Koji | Sekine |
| French | Kôji[](#cite_note-5) | Sekine |
| German | Koji | Sekine |
| Bahasa Indonesia | Koji[](#cite_note-6) | Sekine |