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Ocean Turtle (オーシャン・タートル, Ōshan Tātoru?) is the fifth episode of the Sword Art Online Alicization anime adaptation. It aired on November 3, 2018.

PlotEdit

Asuna witnessing Kazuto lying on the ground after being injected with succinylcholine - S3E05

Asuna witnessing Kazuto lying on the ground after being injected with succinylcholine

On June 28, 2026, having encountered Kanamoto Atsushi, the last remaining member of Death Gun, equipped with a syringe of succinylcholine that he planned to use against them, while escorting Yuuki Asuna home, Kirigaya Kazuto pushed his girlfriend away to safety as he intercepted the man's attack with his umbrella. However, the boy was injected with the drug during the brawl, causing him to collapse due to cardiac arrest. Witnessing this event, Asuna momentarily recalled a similar scene during her time Sword Art Online two years prior, during which she had been protected by Kirito from a Laughing Coffin member's attack.

Kazuto remaining comatose in bed despite undergoing an operation - S3E05

Kazuto remaining comatose in bed despite undergoing an operation

Having accompanied her injured boyfriend to the Setagaya General Hospital for treatment following the attack, Asuna waited in front of the operating room for Kazuto's surgery to be complete, being joined by Kirigaya Midori and Kirigaya Suguha just as she sat down. When the procedure was completed the next morning, the doctor informed them that although the operation saved Kazuto's life, the boy might have sustained permanent brain damage due to the long period of cardiac arrest. As Midori was signing the paperwork to transfer Kazuto to a better facility for magnetic resonance imaging, Asuna and Suguha were approached by Kikuoka Seijirou, who wished to speak with Kazuto's parents.

Asuna and Leafa informing Lisbeth, Silica and Sinon about not being able to see Kazuto - S3E05

Asuna and Leafa informing Lisbeth, Silica and Sinon about not being able to see Kazuto

That evening, Asuna and Suguha arrived at the National Defense Medical College Hospital, the institution where Kazuto was supposed to be currently hospitalised under Seijirou's advice; however, they were not allowed to see the boy. The following day, Asuna and Leafa met Lisbeth, Silica, Sinon in ALfheim Online (ALO), where the two informed the girls that the hospital refused to allow their visit due to Kazuto being treated with specialized equipment at the time. However, feeling suspicious about the claim, the two investigated the matter further and thus discovered that Kazuto's ambulance had never arrived at its destination, despite the boy being admitted to the hospital according to the records.

Yui sharing the results of her investigation - S3E05

Yui sharing the results of her investigation

As Seijirou had disappeared that same day and had access to a device that could connect to the user's soul itself, the girls speculated that Kazuto could have been transported to one of Rath's facilities with a Soul Translator. At that moment, Asuna informed the other girls that she had requested Yui to analyse the data of an application connected to sensors implanted in Kazuto's chest as part of his job, in hopes of finding something that could lead them to his current location. Prompted by Asuna, the Navigation Pixie reported that Kazuto's last known position was in Minato Ward, at around 21:20 the day before.

Asuna, Ryoutarou, Suguha and Yui concluding that Kazuto might have been taken overseas by a helicopter - S3E05

Asuna, Ryoutarou, Suguha and Yui concluding that Kazuto might have been taken overseas by a helicopter

Later that same day, Asuna and Suguha requested Tsuboi Ryoutarou (Klein) to drive them to Kazuto's last known position at the Shinagawa Wharf in Minato Ward, hoping to find more clues as to Kazuto's whereabouts. Following Rika's (Lisbeth's) report from Roppongi that the cameras around Rath's office there had not seen Kazuto, Yui reported that a helicopter had departed from Shinagawa Wharf the moment when Kazuto's signal was lost, much to Asuna's sorrow.

Excerpt of Koujiro Rinko's data found by Yui - S3E05

Excerpt of Koujiro Rinko's data found by Yui

Encouraged not to lose hope by Yui, Asuna continued to search for other hints to Kazuto's whereabouts by asking Suguha if she recalled hearing anything about Rath from her cousin. This led to Asuna learning that the Soul Translator was based on the Medicuboid, a FullDive device for medical purposes created by Kayaba Akihiko and his acquaintance, Koujiro Rinko. The latter, according to Yui's investigation, was a researcher at a university in California, as well as a member of the laboratory that Kayaba Akihiko had worked at, prompting Asuna to speculate that she might have knowledge about the Soul Translator and Rath.

Koujiro Rinko investigating her inbox after receiving a new email - S3E05

Koujiro Rinko noticing a new email.

The following evening in California, while checking her mailbox, filled with invitations from Kikuoka Seijirou to participate in his project, Rinko reminisced about her days with her lover, Kayaba Akihiko. The man had once shared his lifelong dream: a large castle, consisting of multiple floors with a palace at the very top. Moments after finishing her reminiscence, Rinko was alerted to a new e-mail having arrived to her mailbox. To her surprise, however, e-mail was sent by a person named Yuuki Asuna, rather than being another message from Kikuoka Seijirou.

Koujiro Rinko and Megumi Reynolds meeting Kikuoka Seijirou and Higa Takeru at the Ocean Turtle - S3E05

Koujiro Rinko and Megumi Reynolds meeting Kikuoka Seijirou and Higa Takeru at the Ocean Turtle

Several days later, Koujiro Rinko and her assistant Megumi Reynolds were flown to the Ocean Turtle, Rath's secret base in the ocean. Upon landing, the two were greeted by Lieutenant Nakanishi, who escorted them to a control room-like area after numerous security procedures. There, the women met Kikuoka Seijirou and Higa Takeru, Rinko's former colleague from the Shigemura Lab. Stating that the project now had all three individuals he believed to be indispensable for it, two of whom were Rinko and Takeru, Seijirou shared his hope to be able to introduce them to the third person in a few days, as he was currently unavailable.

Asuna demanding an answer regarding Kazuto's whereabouts - S3E05

Asuna demanding an answer regarding Kazuto's whereabouts

At that very moment, Megumi Reynolds discarded her disguise, revealing her true identity as Yuuki Asuna. Due to Seijirou's astonishment, Rinko explained that the young girl had informed her about the Soul Translator and Kazuto's disappearance in order to request her help in reuniting with the boy. Once the two women explained how they had bypassed Rath's security to allow Asuna to infiltrate the base, the girl demanded the whereabouts of her beloved with a serious expression.

New CharactersEdit

LocationsEdit

  • Setagaya General Hospital
  • National Defense Medical College Hospital
  • Rath's Roppongi Office
  • California, America
  • Ocean Turtle

Adaptation NotesEdit

This section is missing some information.
You can help by adopting it and adding the missing information.
Page Adopted By: Gsimenas
Please contact this person before making any major (non-grammar, typo correction etc.) edits on this section.
Adapted from Volume 10, Chapter 2, Parts 1-2
  • Laughing Coffin raid flashbacks were anime original scenes.
  • The entire scene of Kazuto being loaded in an ambulance and his heart stopping was omitted.
  • In the light novel, Asuna did not notify Suguha and Midori until after Kazuto's operation was over.
    • Therefore, the scene of Asuna, Suguha and Midori at the hospital was anime original content.
  • The scene of Seijirou convincing Midori to place Kazuto under his jurisdiction and supposedly transfer him to a military hospital was anime original content.
  • In the light novel, Lisbeth and Silica were not present at Asuna's, Leafa's and Sinon's meeting in ALfheim Online.
  • In the light novel, Asuna, Leafa and Sinon quickly deduced Kirito was at the Ocean Turtle from information previously given to them by him at the Dicey Cafe and news reports on the facility.
    • Therefore, the scenes where Asuna, Suguha and Ryoutarou search the harbor while Shino, Rika and Keiko check Rath's facility in Tokyo was anime original content.
  • In the Light Novel, Yui also explained the concept of «Top-Down AI» and «Bottom-Up AI» at Asuna, Leafa and Sinon's meeting, using herself as an example of «Top-Down AI».
  • The scene of Rinko's and Akihiko's past relationship was anime original content.
  • The scene of Rinko receiving Asuna's E-Mail was anime original content.

TriviaEdit

  • One of YUNA's songs, longing, can be heard on the radio when Ryoutarou is driving Asuna and Suguha to the harbor.

NavigationEdit

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Aincrad Arc Fairy Dance Arc Extra Edition Phantom Bullet Arc Calibur Mother's Rosario Ordinal Scale Alicization Arc Unital Ring Arc
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Light Novels Main Series Volume 01 - Volume 02 - Volume 03 - Volume 04 - Volume 05 - Volume 06 - Volume 07 - Volume 08 - Volume 09 - Volume 10 - Volume 11 - Volume 12 - Volume 13 - Volume 14 - Volume 15 - Volume 16 - Volume 17 - Volume 18 - Volume 19 - Volume 20 - Volume 21
Progressive Series Progressive 01 - Progressive 02 - Progressive 03 - Progressive 04 - Progressive 05 - Progressive 06
Alternative Series GGO 01 - GGO 02 - GGO 03 - GGO 04 - GGO 05 - GGO 06 - GGO 07 - GGO 08 - GGO 09
Clover's Regret Volume 1 - Clover's Regret Volume 2 - Clover's Regret Volume 3
Material Edition Volume 01 - Volume 02 - Volume 03 - Volume 04 - Volume 05 - Volume 06 - Volume 07 - Volume 08 - Volume 09 - Volume 10 - Volume 11 - Volume 12 - Volume 13 - Volume 14 - Volume 15 - Volume 16 - Volume 17 - Volume 18 - Volume 19 - Volume 20 - Volume 21 - Volume 22 - Volume 23 - Volume 24 - Volume 25 - Volume 26 - Volume 27 - Volume 28 - Volume 29
Character Edition Lisbeth Edition - Silica Edition - Pina Edition
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Dengeki Fair Breaking the Damage Limit - 16.8.5 - Agil and Klein’s Exciting Meal - Defensive Power - SAOP 4.1
Other Specials chromatic colors - Hopeful Chant
Web Stories There is But One Ultimate Way
Manga Aincrad Volume 01 - Volume 02
Fairy Dance Volume 01 - Volume 02 - Volume 03
Phantom Bullet Volume 01 - Volume 02 - Volume 03
Mother's Rosario Volume 01 - Volume 02 - Volume 03
Calibur Tankoubon
Alicization Volume 01 - Volume 02 - Volume 03
Progressive Volume 01 - Volume 02 - Volume 03 - Volume 04 - Volume 05 - Volume 06 - Volume 07
Girls Ops Volume 01 - Volume 02 - Volume 03 - Volume 04 - Volume 05 - Volume 06
Ordinal Scale Volume 01 - Volume 02 - Volume 03 - Volume 04
4koma Manga Volume 01 - Volume 02 - Volume 03
SAOAGGO Manga Volume 01 - Volume 02 - Volume 03
Comic Anthology Volume 01 - Volume 02
4koma Anthology Volume 01 - Volume 02 - Volume 03
Hollow Realization Volume 01 - Volume 02 - Volume 03 - Volume 04 - Volume 05
Aincrad Night of Kirito Tankoubon
Kirito's Gun Gale Wars Tankoubon
Anime Season I - Aincrad Arc Episode 01 - Episode 02 - Episode 03 - Episode 04 - Episode 05 - Episode 06 - Episode 07 - Episode 08 - Episode 09 - Episode 10 - Episode 11 - Episode 12 - Episode 13 - Episode 14
Season I - Fairy Dance Arc Episode 15 - Episode 16 - Episode 17 - Episode 18 - Episode 19 - Episode 20 - Episode 21 - Episode 22 - Episode 23 - Episode 24 - Episode 25
Season I - Special Episodes Sword Art Online Extra Edition
Season II - Phantom Bullet Arc Episode 01 - Episode 02 - Episode 03 - Episode 04 - Episode 05 - Episode 06 - Episode 07 - Episode 08 - Episode 09 - Episode 10 - Episode 11 - Episode 12 - Episode 13 - Episode 14 - Episode 14.5
Season II - Calibur Arc Episode 15 - Episode 16 - Episode 17
Season II - Mother's Rosario Arc Episode 18 - Episode 19 - Episode 20 - Episode 21 - Episode 22 - Episode 23 - Episode 24
Movie Sword Art Online The Movie -Ordinal Scale-
AGGO Episode 01 - Episode 02 - Episode 03 - Episode 04 - Episode 05 - Episode 06 - Episode 07 - Episode 08 - Episode 09 - Episode 10 - Episode 11 - Episode 12
Season III - Alicization Arc Episode 01 - Episode 02 - Episode 03 - Episode 04 - Episode 05 - Episode 06 - Episode 07 - Episode 08 - Episode 09 - Episode 10 - Episode 11 - Episode 12 - Episode 13 - Episode 14 - Episode 15 - Episode 16 - Episode 17 - Episode 18 - Episode 18.5 - Episode 19 - Episode 20 - Episode 21 - Episode 22 - Episode 23 - Episode 24
Sword Art Offline Episode 01 - Episode 02 - Episode 03 - Episode 04 - Episode 05 - Episode 06 - Episode 07 - Episode 08 - Episode 09 - Extra Edition
Two Episode 01 - Two Episode 02 - Two Episode 03 - Two Episode 04 - Two Episode 05 - Two Episode 06 - Two Episode 07 - Two Episode 08 - Two Episode 09
Ordinal Scale
Drama CD Accel World + Sword Art Online Drama CD Ordeals of Kirito
Sword Art Online Art Book and Guide Book Main Page

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