The Glassy Water's Surface

Chronology
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Episode 1174-1175 (Int. Episode 1232-1233)
Information
Title:	The Glassy Water's Surface
Japanese title:	ガラスの水面 (Garasu no Minamo)
Original airdate:	September 6, 2025 (Part 1) September 13, 2025 (Part 2)
Broadcast rating:	4.7% (Part 1) 5.0% (Part 2)
Filler case:	#446
Season:	30
Manga source:	TV Original
Case
Cast:	Conan Edogawa Kogoro Mouri Ran Mouri Hiroki Oi Fumimaro Ayanokoji Maro
Case solved by:	Kogoro Mouri (via Conan)
Next Conan's Hint:	Boathouse (Part 1) Noctiluca (Part 2)
Staff
Director:	Yasuichiro Yamamoto Nobuharu Kamanaka
Screenplay:	Akatsuki Yamatoya
Storyboard:	Masaki Ozora
Episode director:	1174: Masahiko Suzuki 1175: Yoshihiro Sugai
Animation director:	1174: Masahiro Sekiguchi Maho Tanabe Tomoyuki Kameda Akihiro Ino Tomoyuki Oshita Shinichi Wada Hideaki Shimada Honoka Kikuchi 1175: Kosei Takahashi Eiichi Tokura Ga-Ryeon Park
Character design:	Masatomo Sudo Rei Masunaga (sub-character) Hiroshi Ogawa (design works)
Production cooperation:	1174: 8bit 1175: Mouse
Voice Cast: Minami Takayama as Conan Edogawa Rikiya Koyama as Kogoro Mouri Wakana Yamazaki as Ran Mouri Kenji Nomura as Hiroki Oi Ryotaro Okiayu as Fumimaro Ayanokoji Jin Urayama as Akihide Kamikawa Fujiko Takimoto as Miku Nishino Ayumi Tsunematsu as Hitomi Togashi Ryota Iwasaki as Hironobu Matsuyama Katsunori Okai as Kanta Tsuji
Music
Opening song:	Poker Face
Closing song:	Fun! Fun! Fun!

The Glassy Water's Surface (ガラスの水面 ,Garasu no Minamo) is the 1174th and 1175th episode of the Detective Conan anime. Taking place in northern Kyoto Prefecture, the story follows Conan, Ran and Kogoro visiting a client that lives in a boathouse in a small port town, at the request of lawyer Hiroki Oi. A mysterious disappearance has taken place, seemingly related to the legend of Urashima Tarō.

Cast

Characters

Conan Edogawa

Kogoro Mouri

Ran Mouri

Hiroki Oi

Fumimaro Ayanokoji

Maro

Gadgets

Gadgets

Stun-Gun Wristwatch

Voice-Changing Bowtie

Anywhere Ball Dispensing Belt

Case

Situation

Part 1

Lawyer Hiroki Oi receives a request from his client, Kanta Tsuji, to investigate the mysterious death of Takeshi Yamaoka, which was said to be caused by the curse of Urashima Taro two weeks ago, and now he entrusts the case to the Mouri family.

On the train to Kyoto Prefecture, where the client is, the Mouri family is discussing the plot of the Urashima Taro fairytale. Urashima Taro is a character who was brought down to the Dragon King's palace by the sea turtle he had rescued earlier to be the main guest of the gratitude party. However, when he returns to the village, several centuries have passed, and all of his friends and family have died.

But one question remains for Ran’s perception: What is the curse of Urashima Taro?

Murder (past)

Location: Ine Bay between Ineura Port and Aoshima Island

Victim: Takeshi Yamaoka

Age: 25 years old

Time: 2 weeks ago

Cause of death: Neurotoxin poisoning

Suspects: Kanta Tsuji, Hironobu Matsuyama, Miku Nishino, Akihide Kamikawa, and Hitomi Togashi

Upon arriving, they begin to hear Tsuji's account of the events two weeks ago: While searching for his missing friend Takeshi Yamaoka with a fisherman named Hironobu Matsuyama; and the head priest of the Urasawa Shrine, Akihide Kamikawa, the three heard a seemingly familiar melody related to the curse of Urashima Taro, and then they discovered Yamaoka's body on a boat with his hair seemingly turned white due to the curse.

Tsuji suspects that one out of the following four people must have killed Yamaoka (He himself is a suspect as well, but there is no reason for him to suspect himself if he didn’t kill him anyways): Matsuyama, Kamikawa, Miku Nishino, and Yamaoka’s ex-girlfriend, Hitomi Togashi. So the Mouri family begins asking them:

• Even though Matsuyama often quarrels with Yamaoka about fishing issues, Matsuyama understands that Yamaoka simply cares about the city, and therefore, he has no reason to be the murderer at all. In addition, he mentions that the island with no population is actually forbidden to enter as it has also been considered sacred ever since the Edo period like the guardian of the other islands, this is because it has protected them from waves and has a shrine for the fisherman who died at sea. And when he is asked if he suspects someone to be the murderer based on conflicts, Matsuyama suggests Nishino for unknown reasons to us.
• Nishino states that she has no conflict with Yamaoka; it’s just that he is her former brother-in-law. So what happened to Yamaoka’s brother?
• Togashi states that she and Yamaoka used to date, but they broke up due to the atmosphere of the island divided by the fishery and tourism, even though it is not as fierce as the Romeo and Juliet story.

Robbery (past)

Location: Urasawa Shrine, Ine Town

Victim: Akihide Kamikawa

Age: 53 years old

Time: 3 days before Takeshi's murder

Stolen items: Relics from the shrine consisting of a turtle shell and two treasure boxes

Suspects: Takeshi Yamaoka, Kanta Tsuji, Hironobu Matsuyama, Miku Nishino, Akihide Kamikawa, and Hitomi Togashi

• And finally, Kamikawa tells them about the robbery that happened before the death of Yamaoka, as some stolen property was also seen along with the corpse, and he expresses his surprise when they haven’t been informed that Nishino is attempting to kill Yamaoka following the latter’s word before his death. Then he mentions Yamaoka's brother, who mysteriously disappeared 4 years ago on a fishing trip. At the funeral, he did not believe the desperate words of Nishino and suspected that she was the one behind his death.

Missing person (past)

Location: Ine Bay

Victim: Kazuo Yamaoka

Time: 4 years ago

Cause of death: Missing at sea

Suspects: Miku Nishino

The local police believed that Kazuo had entered the rough waters outside the bay and met his end there, but Takeshi argued that his brother knew the waters like the back of his hand and could not have made such a mistake. Takeshi's suspicions gradually turn to Nishino being responsible for his brother's death after hearing her hopeless words at his brother's funeral.

While the Mouri family is on their way somewhere and is discussing whether Nishino is the culprit, considering the many suspicions pointing to it, the three have been alerted by someone’s watchful eyes, so they begin discussing a countermeasure and learn that the stalker was Togashi. In reality, she only wants to help them, but Kogoro tells her it is too dangerous for her, and advises her to give up on the case. After the three of them left, she mutters that he should have considered the possibility that she might be the culprit because she wanted to get revenge on her ex-lover. Still, she sees another suspect acting similarly to her.

Around dinner time, Conan calls lawyer Hiroki Oi to ask more about the victim and learns that he died from a type of frog's neurotoxin, and that at the two times the two brothers ​​were claimed to die, Nishino was reported by her subordinates to be at her workplace. During dinner, Conan asks Tsuji about Nishino's rumors, to which he replies that the whole city knows that she has a grudge against Takeshi. He also mentions that the reason Takeshi and Matsuyama quarreled was that Takeshi did not want to participate in aquaculture to ensure a stable supply, which ultimately turned out to be a great success. The reason he suspected the head priest was that some stolen property was found with the body.

Then, somehow, Togashi gets Kogoro's number and starts calling him. However, when she reports about a suspicious person saying something like "destroy evidence" to a wall, she is silenced by the suspicious person, interrupting the call between the two. Not the unexpected, but no one expected, the unfortunate girl was silenced forever before she could inform the detective.

Murder

Location: Ineura Port

Victim: Hitomi Togashi

Age: 24 years old

Time: Three hours ago

Cause of death: Blunt force trauma

Suspects: Kanta Tsuji, Hironobu Matsuyama, Miku Nishino, and Akihide Kamikawa

A while later, Inspector Ayanokoji (with his chipmunk, Maro, as usual) arrives at the crime scene thanks to a boat from the Kyoto police, much to Conan's contentment.

Part 2

Inspector Ayanokoji expresses his surprise that he meets the Mouri family again because it just feels like a strange connection (for Ran, he even saved her life once), Conan also expresses his wonder if the seriousness of this case had attracted his attention, to which he assumes so. But since it is quite late at night now, he wants to rest and investigate tomorrow, perhaps as an excuse to go to Nishino's super luxurious ryokan (he comes from a wealthy family after all) to enjoy the hot springs with Maro.

The old case could not be solved when Nishino avoided all the questions related to the death of the two brothers that Kogoro and Ayanokoji asked and it seemed like it would hit a dead end, until the Mouri family sees the arrow mark written in chocolate syrup by Togashi, giving them a glimmer of hope to discover what she was trying to tell Kogoro. This hope is suddenly extinguished when it rains, erasing the syrup marks she left. During that time, Inspector Ayanokoji's team informs them that they find a box similar to the small one stolen at Urasawa Shrine containing the poisonous frog that took Takeshi's life in Nishino's room. However, she tells them with great confidence that if they want to convict her, they will have to disprove her alibis.

Returning to the inn to rest, Ran and Conan discuss the Urashima Taro fairy tale again after the discussion last night when Ran seemed to be still troubled by the recent events. And from the above discussion, the boy discovers an unusual point in the case, so he starts calling the lawyer Hiroki Oi to confirm something while running to the ryokan to ask inspector Ayanokoji to lead him to the island with no population to verify that deduction.

People

Kanta Tsuji
	25 years old "Yamatoya" boathouse owner

Takeshi Yamaoka
	Victim (poison) 25 years old Fisherman

Hironobu Matsuyama
	28 years old Fisherman

Miku Nishino
	26 years old Ryokan "Akatsuki" owner Kazuo's ex-wife

Akihide Kamikawa
	53 years old Urasawa shrine head priest

Hitomi Togashi
	Victim (drowned?) 24 years old "Isago-T" café manager Takeshi's ex-girlfiend

Kazuo Yamaoka
	Deceased? Missing at sea since four years ago Takeshi's older bother Miku's ex-husband

Resolution

  Show spoilers »

Conan calls Ayanokoji pretending to be Kogoro and arranges for all the suspects to gather at Ryokan Akatsuki. When everyone gathers, Kogoro says he did not call them over, but Conan knocks him unconscious with his wristwatch. The deduction starts, with Kogoro explaining that Takeshi Yamaoka's death was a suicide. He could not grieve his brother's disappearance and decided to frame Miku Nishino with his own suicide, since he believed she killed Kazuo. He stole the relics from Urasawa-jinja and went by boat to the island across the harbor to start his plan. He built a cabin there where he prepared a boat and dying ingredients. Following that, he died his own hair white and wore the turtle shell and put the larger relic box on the boat. Before that, he snuck into Nishino's house and put the small relic box in her room along with the poisonous frog from which he extracted poison. Before his death, he climbed into the boat and took the poison extracted from the frog and let the currents carry his body over to the shore. Now, this disproves Nishino's guilt in Takeshi's death, but she is not completely innocent.

Indeed, Miku Nishino is the culprit behind Kazuo Yamaoka's disappearance four years ago. The clues that pointed to her guilt were how she quickly accepted his death and how she built the lavish Akatsuki Ryokan using his life insurance. She built the hotel despite restrictive building laws and mostly was able to do so by inheriting fisherman Kazuo's boathouse, thus hinting that she only married him for the land the house stood on. She also killed Hitomi Togashi before she could reveal that she saw Nishino speaking to her dead husband, which is evidenced by Togashi's distinctive chocolate syrup which can be found under Nishino's shoes. After she was first knocked unconscious by Nishino, Togashi most likely grabbed the heel of Nishino's shoes to leave evidence, after which she was beaten to death. Without acknowledging killing Togashi, Nishino says that there is no evidence that she has Kazuo's dead body, but Kogoro refutes that, pointing at her hotel's peculiar structure. The roman baths have unusually thick walls despite the hotel being not that big, and a statue is placed in the wall with a sign "do not touch", hinting that she hid the body there. He asks her to surrender since they have evidence she killed the two, but Nishino decides otherwise.

Grabbing a vase from the conference room they are in, she smashes a window and escapes through it. Ayanokoji says that she cannot go far since it's on the first floor, but she surprisingly manages to escape on a boat in the bay. They realise that the thick walls and ceilings of the roman baths also hid a boat, which she remotely deployed and used to escape. Matsuyama offers his help chasing after the culprit and Ayanokoji, Ran and Conan hop onto his boat with him and chase after her. They try to get to her before the marine police who Ayanokoji has already contacted. Matsuyama says she cannot go far in that small boat, and Conan realizes her true intention when she escaped.

Attempted suicide

Location: Ine Bay between Ineura Port and Aoshima Island

Victim: Miku Nishino

Age: 26 years old

Modus operandi: Drowning

When she arrives further in the bay and sees Matsuyama's boat closing in on her, she picks up the anchor of her own boat and leaps into the water with it. Conan jumps right after her and manages to get a hold of her, but both are now sinking. He decides to use his belt to launch a massive inflatable football to push both of them to the surface. An unconscious Nishino is later arrested.

Aftermath

At the end of the case, Conan discusses with lawyer Oi about the case's conclusion and hands the lawyer a box of Kyoto Yatsuhashi. Both wonder why this snack has been associated with Kyoto as they drive away in the city.

Trivia

• This is the first case to take place in Kyoto Prefecture (outside of Kyoto City).
• The names of Tsuji's Ryokan and Nishino's lavish hotel-style Ryokan are taken from screenwriter Akatsuki Yamatoya's own name.
• The main inspiration for the setting location is the small town of Ine, in Yosa District, Kyoto Prefecture. The boathouses shown are the world-famous "funaya" (舟屋) from the Ineura area. Other features incorporated into the episode are the streetscape of Ineura and Ine Bay.
  • This is proven when when Nishino says that the town has less than 2,000 inhabitants and that it has no railway connection. This is indeed true in the case of Ine Town, although its population has fallen to around 1,800 inhabitants in its 2025 estimate.
  • The Urasawa Shrine (浦沢神社) is the real-life Urashima-jinja (浦嶋神社) in Ine's Honjōhama area, known for its relation to the legend of Urashima Tarō. Are shown in the episode the shrine's gate, worship hall and the Urashima Myōjin Hanging Scroll (浦嶋明神縁起絵巻), as well as the treasure box found on Takeshi Yamaoka's body, which is a real-life artifact. The name in the case is taken from Yoshio Urasawa, another screenwriter for the Detective Conan anime-original episodes and Yamatoya's mentor.
  • The uninhabited island in the bay corresponds to the real-life Aoshima Island.
• The song heard before finding the victims' bodies is children's song "Urashima Tarō".
• Kogoro's shiny business cards reappear in part 1.
• The architect Pierre Lemaître's name comes from French jockey Aurélien Lemaitre and possibly from French jockey Pierre-Charles Boudot.

Gallery

In other languages

Language	Title	Translation
Arabic	اسطورة اوراشيما تارو	The Legend of Orashima Taro
French (Subbed)	L'Eau à la surface vitreuse	Water with a glassy surface
Thai	ผิวน้ำกระจกแก้ว	The Glassy Water Surface

See also

• Season 30