The Crimson Skeleton of Mt. Washio

Chronology

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Episode 1178-1179
(Int. Episode 1236-1237)

Information

Title:

The Crimson Skeleton of Mt. Washio

Japanese title:

鷲雄山の紅蓮髑髏
(Washio-san no Guren Dokuro)

Original airdate:

October 11, 2025 (Part 1)
October 18, 2025 (Part 2)

Broadcast rating:

6.1% (Part 1)
6.0% (Part 2)

Manga case:

#322

Season:

30

Manga source:

Volume 105 - F3~5 (1116 · 1117 · 1118)

Case

Cast:

Conan Edogawa
Kogoro Mouri
Ran Mouri
Heiji Hattori
Kazuha Toyama
Momiji Ooka
Muga Iori
Shinichi Kudo

solved by:

Conan Edogawa
Heiji Hattori

Next Conan's Hint:

Bucket (Part 1)
Sunset (Part 2)

Staff

Director:

Yasuichiro Yamamoto
Nobuharu Kamanaka

Organizer:

Hiroaki Takagi

Storyboard:

Hiroaki Takagi

Episode director:

1178: Ayumi Iemura
1179: Minoru Tozawa

Animation director:

1178:
Masatomo Sudo (supervisor)
Asuka Tsubuki
Yui Ushinohama
Miho Tanaka
FALCO Suzuki
1179: Keiko Sasaki

Character design:

Masatomo Sudo
Keiko Sasaki (sub-character)
Hiroshi Ogawa (design works)

Voice cast:

Minami Takayama as Conan Edogawa
Rikiya Koyama as Kogoro Mouri
Wakana Yamazaki as Ran Mouri
Ryo Horikawa as Heiji Hattori
Yuko Miyamura as Kazuha Toyama
Satsuki Yukino as Momiji Ooka
Daisuke Ono as Muga Iori
Kappei Yamaguchi as Shinichi Kudo
Naoki Tatsuta as Tetsushin
Yoshiyuki Kono as Tontetsu
Ken Takeuchi as Kentetsu

Music

Opening song:

"Poker Face"

Closing song:

"Fun! Fun! Fun!"

The Crimson Skeleton of Mt. Washio (鷲雄山の紅蓮髑髏 ,Washio-san no Guren Dokuro) is the 1178th and 1179th episode of the Detective Conan anime.

It adapts the Chapters 1116-1118 from the original manga. The Part 1 was first aired in October 11, 2025 and Part 2 at October 18, 2025.

In this two-parter, Conan, Ran, Kazuha, Heiji and Kogoro goes to Mt.Washio and took shelter from the rain at a nearby shrine. Things get detrimental when Kogoro goes missing and a terrifying scream that leads everyone to witness the legend will-o’-the’-wisp going upstairs to the confessional where the missing monk is found dead.

Cast

Characters

Conan Edogawa

Kogoro Mouri

Ran Mouri

Heiji Hattori

Kazuha Toyama

Momiji Ooka

Muga Iori

Shinichi Kudo (flashback)

Case

Part 1

Conan, Ran, Kogoro, Heiji, and Kazuha are climbing to the top of Mount Washio when it rains. The umbrella Kazuha brought only has enough space for three people, so Kogoro and Heiji end up soaking in the rain. Luckily, Kogoro sees a shrine near the location where they are standing, so they decide to ask for permission to stay. The chief priest agrees to let them stay, and tells the other two monks to welcome them. The visit should be normal as the group rests at a room, until Conan suggests asking the fourth monks when Heiji’s amulet has been lost by accident, because the fourth monk has been missing for several days after being punished to go to the confessional for smoking. The monks also recall the appearances of the will-o’-the-wisp, which make everyone believe that the missing monk has been devoured by the monster appearing along with the will-o’-the-wisp, the crimson skeleton.

Legend says that the crimson skeleton will devour the soul of wrongdoers and leave behind the corpse of victims.

Later, Kogoro just finishes using the restroom, and is going back to the group when he sees an iron ball falling down from the stairs leading to the confessional. However, when Kogoro arrives at the top of the stairs, intending to give back the iron ball, he is knocked out by someone. Ran becomes worried because her father has gone for quite a while, then, everyone hears a terrifying scream. Outside the room where the scream originates, everyone witnesses the will-o’-the-wisp going straight to the confessional, leading to the answer of why the fourth monk is missing. Based on the environment around the body, Heiji concludes that the culprit must have been either one out of the three remaining monks.

Murder

Location: Shōgakuji temple

Victim: Kantetsu

Age: Unknown

Time: Between one and two days ago

Cause of death: Dehydration

Suspects: Tetsushin, Kentetsu and Tontetsu

Meanwhile, Kogoro wakes up in a room, being bound on wrists and arms while also being gagged to avoid making a sound, trying to recall what he saw in the confessional before being knocked out.

Assault and kidnapping

Location: Shōgakuji temple

Victim: Kogoro Mouri

Age: 37-38 years old

Attack type: Shocking

Suspects: Tetsushin, Kentetsu and Tontetsu

Currently, the police could not arrive at the shrine due to rain, so Conan and Heiji decide to ask the three monks for information about someone seeing spirit flames and a body in the woods, which was mentioned earlier in the episode by them. The chief priest recounts: One night around a month ago, a hiker passing by the steps in the woods nearby saw the spirit flame. The hiker fearlessly climbed the stone steps to see if anything was there or not, only to find a burnt corpse in the ground. The corpse belongs to a Buddhist religious art expert who had complained about the Kannon statue at the shrine earlier that faithful day.

Murder (Past)

Location: Shōgakuji temple

Victim: Jun Murata

Age: Unknown

Time: One month ago

Cause of death: Dehydration

Suspects: Tetsushin, Kentetsu and Tontetsu

Meanwhile, Kazuha and Ran are still looking for Kogoro while calling for his phone. Kogoro notices that his phone is still in his pocket, meaning the culprit must have performed in a hurry, so he takes the chance, trying to contact either Conan or Ran using his legs only. At the hallway of the room where Conan and the girls were waiting for Heiji and Kogoro to dry themselves earlier, Conan ask if Heiji found the amulet or not, to which he recalls that the amulet’s string was stretched out at the time he found it in the confessional. The amulet is also stained, to which Conan explains it might be because Heiji stepped on it with his stained socks. Heiji points out that Conan's socks are also stained as his. Just then, Conan receives a message from Kogoro containing only a picture of several statues.

Part 2

At the hallway of the room, Ran is crying over the fact that she and Kazuha could not find Kogoro, despite searching everywhere they could, and that Kogoro could have been devoured by the crimson skeleton. Kazuha reassures Ran that it isn’t the case because Conan said the crimson skeleton did not exist.

People

Tetsushin
	70 years old Shogaku Temple chief priest

Kentetsu
	28 years old Shogaku Temple monk

Tontetsu
	31 years old Shogaku Temple monk

Kantetsu
	Victim (dehydrated) Shogaku Temple monk

Man
	Hiker on Mount Washio one month ago

Jun Murata
	Deceased (dehydrated) Buddhist religious art expert

Resolution

  Show spoilers »

Tontetsu has a secret room that is opened by using a magnet. The room is used to keep the replica version of Kannon statues he carved from the original one to make profit out of it. The room also keeps a lighter used for camping and paper tubes to create the scenery of will-o’-the-wisp. In case one is curious how to make paper tubes, they can follow this guide: Gluing one edge of the paper, then roll it so that the glued edge reaches the other edge.

The type of lighter that is often used for camping, according to Conan.

One month ago, the Buddhist religious art expert discovered that the statue is not original, so he was killed by Tontetsu. Several days ago, Kantetsu happened to discover the secret room inside the confessional because it wasn’t shut properly, and saw statues looking one displayed at the shrine, Tontetsu murdered him to conceal the secret. Earlier the day, Tontetsu was opening the door using the magnet disguised as one of the beads of the prayer beads when he dropped it by accident. Kogoro picked up the magnet, assuming it was just an ordinary iron ball, intending to give it back. Tontetsu thought his secret could be revealed, so he electrocuted Kogoro and kept him in the confessional.

Counterfeiting

Location: Shōgakuji temple

Culprit: Tontetsu

The culprit attempts to flee from custody, unawaring of how Conan and Heiji got the lighter and paper tubes. The duo reveal that they got it from the secret room, and that the secret room is where they found Kogoro tied. At the hallway of the shrine, Kogoro has been waiting for the culprit to give the monk his own medicine, Ran and Kazuha follow the culprit to witness him having been knocked out. Ran then notices the rain has stopped, so she grabs Heiji to Kazuha’s location in order to have him confess his feelings to Kazuha. Heiji and Kazuha are able to see the beautiful scenery of dusk at Mount Washio, but just as we thought what has to happen, has to happen, Heiji proposes that he and Kazuha should go home. Yes, we heard/saw that right! Heiji takes advantage of the beautiful scenery to tell her that the two should go home instead of confessing his feelings to her. Ran and Conan become speechless because of this.

Manga to anime changes

• Some scenes added by the anime:

• Ran saying that they just took a break and will leave Kogoro behind
• More scenes of Conan blushing when Ran tells Kazuha about her dating with Shinichi
• Tetsushin asking if someone lose something
• Heiji wondering if Kogoro ate some weird mushrooms and upset his stomach (refering to the incident in A Cottage Surrounded by Zombies)
• Ran calling Conan after he found a wood shaving

• In the scene where Heiji tries to scare Kazuha about "when the time comes", the anime add an imaginary wolf ear on Heiji.
• In manga, Kogoro found the temple by himself. In anime, Conan is the one who pointed it out first.
• Kentetsu's explanation about the sunset view is expanded compared to manga version. His line about relaxing until evening is also anime addition.
• The direction where Heiji and Conan are going after asking Kazuha about her tablet is reversed compared to manga.

Trivia

• Mount Washio (鷲尾山 ,Washio-san) is a direct reference to Mount Takao (高尾山 ,Takao-san), a mountain in the Tokyo region and popular among tourists and locals to view Mount Fuji on the other side.
  • The mountain temple Shōgaku-ji (昇楽寺 ,Shōgaku-ji) is a pun to the name of Conan's publisher, Shōgakukan (小学館), in the same fashion as the temple with the same name but different kanji (昇岳寺 in the previous case instead of 昇楽寺) from files 559-561. The temple itself does not follow the design of the actual temple on Mount Takao, the Takaosan Yakuō-in (高尾山薬王院), which contains the similar looking kanji "薬". Instead, it follows the design of the Zōjō-ji (増上寺), famous temple in Tokyo. In particular, it is a replica of the Ankoku-den (安国殿), a secondary hall of the temple, which also has its famous relic, a statue of a standing Amida Nyōrai (an iteration of Buddha).
  • The chastisement room has the same proportions as the storage room in Sandei Temple (山泥寺 ,Sandei-ji) from files 108-110.
• The names of the monks are related to iron (鉄 ,tetsu) and monsters (妖怪 ,yōkai) :
  • Tetsushin (哲進) comes from iron and shen (蜃 ,shin), a shapeshifting clam monster ;
  • Kentetsu (賢哲) comes from iron and Xingtian (刑天 ,keiten), a headless monster ;
  • Tontetsu (頓哲) comes from iron and Taotie (饕餮 ,tōtetsu), a monster in Chinese mythology ;
  • Kantetsu (勘哲) comes from iron ;
  • Additionally, Jun Murata (村田 潤) comes from Jun Murata (same kanji), a real-life director for NHK who filmed Gosho Aoyama's behind-the-scenes work for a 2024 documentary film.
• In Part 2, there is a mistake where the layout frame and part of line drawing of are not removed.

Gallery

In other languages

Language	Title	Translation
Arabic	جمجمة جبل واشيو الملتهبة	The Inflamed Skeleton of Mt. Washio
French (Subbed)	Le Crâne écarlate du Mont Washio	The Crimson Skull of Mount Washio
German (Subbed)	Der flammend rote Totenkopf vom Berg Washio	The flaming red skull of Mount Washio
Thai	กระโหลกโลหิตแห่งเขาวาชิโอะ	The Blood Skull of Mount Washio

See also

• Season 30