Takumi Jumonji

* Anime
* Manga

**Takumi Jumonji** (十文字 匠, *Jūmonji Takumi*) is the director of the Nandan Observatory.

## Biography

### History

Ten years ago, Jumonji was the first to arrive at Nandan Observatory after his father killed six people and then himself. He hid the murder weapon and swore to keep his family's crime and shame a secret. Because of his actions, the case was never solved.

### Island Observatory Murder Case

Jumonji picks up Totomaru Isshiki and Ron Kamonohashi and brings them on a boat to Nandan Island. On the way, he tells Toto that he invited him to the viewing party for the meteor shower in the constellation of Leo because he has a friend that works for the Aichi Prefectural Police. This friend heard of Toto from Omito Kawasemi and then told Jumonji about him and his accomplishments. Because of that, Jumonji thought Totomaru would be the right person to invite to the party to act as a "deterrent" against crime, especially considering that one of his guests is concerned about the case from ten years ago. However, before Jumonji can elaborate on that, Ron stops him as he currently does not want to hear anything about any cases. Jumonji then tells Ron and Toto about Nandan Island and its sugarcane which delights Ron.

Not long afterward, they reach the island and walk to the Nandan Observatory. Jumonji shows them around and when he opens the door to the observation dome, they hear the cook Minami Unno yell "I'll kill you!". They are baffled, and Unno explains that she does that every time she gets pissed off to release stress because the dome is soundproof when it is closed. Jumonji remarks that he did not know that.

Then, astronomy chairman Eisaku Donzawa, astronomical photographer Kayoko Onodera, and BLUE instructor John Grizzly join them after having heard the ruckus. Jumonji introduces Grizzly and Totomaru to everyone as they are here to act as bodyguards to keep the party safe. Ron asks why someone like Grizzly has been invited to be a bodyguard, and Onodera and Grizzly inform him about the tragic and unsolved Nandan Observatory Murder Case.

Jumonji reveals that the director back then, who also died in the tragedy, was his father and he is holding the viewing party to overcome that tragedy because this is what his father would have wanted. Afterward, Princess Ori arrives as well, and Ron opens the dome, setting the telescope in motion. Jumonji then tells everyone that the party will be held on the roof at 11 p.m.

Later that night, Jumonji watches the meteor shower with the others, sans Ron who left early. Two hours later, the observation dome opens and moves and a gunshot is heard from inside it. Jumonji and the others rush to the observation dome's entrance but the door is locked. He runs to get the master key. However, he cannot find it, and he, Grizzly, and Toto have to break down the door. They can open it, and Unno arrives with some flashlights; Jumonji told her earlier to get some.

Jumonji, Totomaru, and Grizzly inspect the room and find Onodera and Ron lying unconscious on the ground, the telescope between them. There is also a gun next to Ron. Grizzly confirms Onodera's death, and Ron wakes up from his sleep. He says that he does not remember anything after leaving the party and lying down in his bed.

While Jumonji, Princess Ori, Unno, and Donzawa stay by the door, Grizzly and Toto inspect Onodera's corpse. Grizzly says she died right before she was found; she was shot in the back, and the bullet pierced her heart. He confiscates the gun, and Donzawa points out that it is the model gun from the lobby. Jumonji is surprised to find out that it is, in fact, a real gun.

Then, Toto and Grizzly examine the dome. All the lights have been shot out. There is no ladder which means nobody escaped through the ceiling; the motion detector was also not set off. The exhaust port is too small for anyone to escape through. Because there are no other exists, Grizzly declares that Ron must have been the murderer. The door was locked too after all. Surprised, Ron sits up and then finds the master key in his pocket. Grizzly orders Toto to arrest Ron and tells Jumonji to call the mainland police. Jumonji thanks him for his help. He then goes to call the police, but because of a typhoon, the police will not be able to arrive before tomorrow morning.

At some point, Jumonji was interviewed by Grizzly. He told him that he briefly went to his office at 11:30 p.m. because he had forgotten his astronomical observation notebook; he was back on the roof by midnight.

Later that night, Grizzly finds out that Jumonji is the true culprit and seeks him out. Jumonji lures him to the roof and shoots Grizzly off the building. He dies shortly after his impact on the ground. From the roof, Jumonji watches while Toto and Ron gather around Grizzly's corpse.

Jumonji then runs out into the rain to Toto and Ron. Donzawa follows him with an umbrella in his hand. Ron very quickly updates them on the situation. Afterward, everyone gathers in the lobby where Toto informs everyone about the results of his examination of the roof: He found the same gun that was used to kill Onodera there; the culprit must have stolen it from Grizzly. Toto then verifies everyone's alibis: Jumonji was in his room and ran outside when he heard the gunshot. Donzawa was in the first-floor bathroom and met Jumonji in the lobby on his way to find the gunshot's source. Neither Unno nor Princess Ori heard the gunshot; Unno was sleeping with earplugs in, and Ori wore headphones to check the sound of her performance recording. Thus, none of them have an alibi. Ron then declares to everyone that the culprit angered the one person they should not have.

Later, Totomaru gathers everyone in the observation dome to arrest the killer. It is the one person who immediately knew to run outside and not go up the roof from where the gunshot had come; the one who ran out of the building without an umbrella to conceal his already-soaked state: Jumonji.

Jumonji protests, saying that he ran outside after he heard the gunshot because he has lost his composure and was not thinking. He also reminds him that he could not have killed Onodera because he was with everyone on the roof, but Totomaru tells him that he figured out that trick too: Jumonji pretended that he needed to go to his room. He looked for Onodera, then attacked and drugged her before he carried her to the observation dome. Afterward, he placed Ron, whose food he had laced with sleeping medicine beforehand, next to the telescope. Jumonji put the master key in Ron's pocket and glued the dome's door shut. Onodera, who was given a lighter dose of the drug, woke up before Ron. Because it was pitch-black, she tried to turn on the light, but Jumonji had destroyed the lamps earlier. She then went to the door; however, because it was glued closed, she thought it was locked, and when she turned the key, she locked the door. With the lights broken and the door locked, Onodera went to open the dome's ceiling. As a result, the telescope turned and triggered a mechanism that set off a gun which then shot her in the back and immediately killed her.

The gun had been positioned in an air vent, and Jumonji had put the model gun from the lobby next to Ron. When everyone's attention was on Onodera's corpse, Jumonji retrieved the real gun from the vent. He later used it to kill Grizzly.

Jumonji wants to know if Totomaru has any proof that he is the murderer. Totomaru counters this with a question of his own: Before they broke open the dome's door, Jumonji told Unno to get flashlights. How did he know about the dome's broken lights? After all, only the killer could know this.

Jumonji confesses and reveals that Onodera was, in fact, a journalist who investigated unsolved crimes. She wanted to find out the truth about the tragedy from ten years ago and had been coming to the observatory for this reason for years, and when she left the viewing party, she actually searched Jumonji's room for clues. Because Jumonji had been hiding the truth for all those years and did not want Onodera to learn and expose it, he murdered her. He killed Grizzly because he kept on investigating although the initial situation incriminated Ron until he figured out that Jumonji is the true culprit.

His confession triggers Ron's Kill on Sight ability. Ron holds out the gun to him and tries to pressure him to take it and shoot himself, but Toto tackles Ron before the ability takes hold of Jumonji. Jumonji then takes out a cyanide capsule and swallows it. Ron shakes him and demands to know why the trap was for him and if he anticipated his presence here. Jumonji tells him that he did and that no matter how much he struggles, he will never escape "his" grasp. Ron wants to know what he means, but Jumonji only says that the sun is rising before he "dies."

The local police arrives and examines Jumonji's body before they transport it to the mainland on a boat. On the boat, Jumonji zips open his body bag and sits up. Earlier, he ate fizzy almond-scented candy and put a ball under his arm to stop his pulse to fake his death. He thanks the "police officer" for helping him to avoid his death and start a new life. Jumonji reached out to the legendary M. Family for assistance because of his trouble with Onodera, and he is still amazed that the organization actually exists.

The "policeman" then asks him how Ron was. Jumonji tells him that Ron changed after his admission; there was genuine murderous intent in his eyes. It was exactly like he had been told it would be. After receiving this confirmation, the "police officer" shoots Jumonji in the head as his duty was done.

## Etymology

* The name "Takumi" means "artisan" (匠).
* His surname "Jumonji" means "cross/crisscross, cruciform" (十文字).

## Trivia

* Jumonji shares his first name with a different character, Takumi Tonami. However, their names are written with different kanji. Jumonji's with the regular "匠" (artisan) and Tonami's unusually with "宅" (house, home) and "已" (stop, previously).

## References

1. ↑ *Ron Kamonohashi: Deranged Detective* manga; Chapter 13, pages 13-14
2. ↑ *Ron Kamonohashi: Deranged Detective* manga; Chapter 9, pages 3-21
3. ↑ *Ron Kamonohashi: Deranged Detective* manga; Chapter 9, pages 28-35
4. ↑ *Ron Kamonohashi: Deranged Detective* manga; Chapter 10, pages 3-16
5. ↑ *Ron Kamonohashi: Deranged Detective* manga; Chapter 10, pages 25-26
6. ↑ *Ron Kamonohashi: Deranged Detective* manga; Chapter 11, pages 5-6
7. ↑ *Ron Kamonohashi: Deranged Detective* manga; Chapter 11, page 18
8. ↑ *Ron Kamonohashi: Deranged Detective* manga; Chapter 11, pages 21-27
9. ↑ *Ron Kamonohashi: Deranged Detective* manga; Chapter 13, pages 5-6
10. ↑ *Ron Kamonohashi: Deranged Detective* manga; Chapter 12, pages 6-14
11. ↑ *Ron Kamonohashi: Deranged Detective* manga; Chapter 13, pages 3-19
12. ↑ *Ron Kamonohashi: Deranged Detective* manga; Chapter 13, pages 22-23
13. ↑ *Ron Kamonohashi: Deranged Detective* manga; Chapter 13, pages 30-34