Secret Laboratory

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This article is in need of research.
Reason: Currently, the information on this page comes from the Persona 4 and Persona 4 Golden guidebooks. If there is something that doesn't match gameplay, then it's due to it being wrong in the guide as well.
Secret Laboratory
秘密結社改造ラボSecret Society Remodeling Lab
P4G EntranceP4G Inside

Entrance screenshot from Persona 4 Golden

Inside screenshot from Persona 4 Golden

Location TV World

The Secret Laboratory is a dungeon in Persona 4. It becomes available to investigate on September 16th after Naoto Shirogane goes missing and must be completed by October 5th.

Investigation

After Naoto goes missing, the following must be done before the player can access the Secret Laboratory:

  • Speak with the female student in front of classroom 1-1 at Yasogami High School.
  • Speak with the police officer in the Northern Shopping District on Monday, Wednesday or Friday.
  • Speak with Chie Satonaka at the Samegawa Flood Plain Riverbank.
  • Speak with the police officer in the Northern Shopping District again.
  • Speak with the housewife in front of the shrine.
  • Speak with the police officer in the Southern Central Shopping District on Tuesday, Thursday or Saturday. While speaking with him, select these dialogue options:
    • "Has an obsession with the case."
    • "They consider him a child."

The earliest possible date that the Secret Laboratory can be properly accessed is September 17th.

Persona 4 Gameplay

Maps

  • The entrance map is called the Secret Laboratory Entrance
  • Each map is called a basement floor and they are numbered B1F through B9F
  • Fixed Layouts: B4F (Mini-Boss), B6F, and B9F (Boss)

Encounters

Name Arcana Level Notes
Rainy Brother 1 Strength 44 Rain Spawn
Rainy Sister 1 Chariot 44 Rain Spawn
Insolent Basalt Chariot 45
Source Basalt Strength 45
Constancy Relic Empress 46
Flattering Hablerie Magician 47
Inviting Nyogo Strength 47
Royal Dancer Lovers 47
Flowing Sand Fortune 47
Red Sigil Hierophant 48
Rainbow Twins Hierophant 48 Rain Spawn
Dogmatic Tower Hierophant 48
Dismayed Panzer Chariot 48
Shallow Okina Hermit 49
Furious Gigas Strength 50
Opulent Hand Magician 50 Rare Spawn
Mighty Beast Strength 50
Raindrop Musha Strength 51 Rain Spawn
Chaos Fuzz Hierophant 51
Wild Drive Chariot 51
World Balance Fortune 52
Fail Gene Fortune 52
Immoral Snake Lovers 52
Mach Wheel Chariot 52
Order Giant Justice 53
Wicked Turret Chariot 53
Mind Dice Fortune 53
Fierce Cyclops Hanged Man 53
Truth Pesce Priestess 53
Power Castle Emperor 54
Jotun of Power Hanged Man 54
Elegant Mother Empress 54
Hell Knight Emperor 55
Dominating Machine Justice 57

Bosses

Name Arcana Level Notes
Dominating Machine (Mini-Boss) Justice 53 Mini-Boss
Shadow Naoto Fortune 55 Boss
Extreme Vessel Chariot 57 Optional Boss. Oct 12th onwards.

Shuffle Time: Personas

This section is a stub. You can help Megami Tensei Wiki by expanding it.
Reason: Missing floors
Level Arcana Persona Area(s)
34 Empress Gorgon ?
34 Moon Yamata-no-Orochi ?
34 Emperor Setanta ?
36 Hierophant Flauros ?
36 Death Samael ?
37 Priestess Parvati ?
37 Devil Pazuzu ?
38 Justice Dominion ?
39 Hanged Orthrus ?
39 Magician Dis ?
40 Temperance Genbu ?
40 Sun Yatagarasu ?
41 Emperor Okuninushi ?
41 Moon Alraune ?
41 Hermit Hitokoto-Nushi ?
42 Strength Hanuman ?
43 Chariot Triglav ?
43 Star Fuu-Ki ?
44 Devil Succubus ?
44 Empress Gabriel ?
45 Hierophant Hokuto Seikun ?
45 Emperor Thoth ?
46 Fool Decarabia ?
46 Death Mot ?
47 Magician Rangda ?
47 Temperance Seiryu ?
47 Sun Narasimha ?
48 Priestess Kikuri-Hime ?
48 Moon Girimehkala ?
48 Hermit Kurama Tengu ?
49 Justice Throne ?
50 Strength Kali ?
50 Star Ganesha ?
51 Emperor Pabilsag ?
52 Hierophant Cerberus ?
52 Empress Skadi ?

Items

This section is a stub. You can help Megami Tensei Wiki by expanding it.
Reason: Missing floors

Normal Chests

Item Location
Amrita Soda ?
Purifying Salt ?
Purifying Water ?
Goho-M ?
Assault Signal ?
Cyclone Magatama ?
Hell Magatama ?
Diamond Shield ?
San-zun Tama ?
Revival Bead ?
Arc Magatama ?
Curse Paper ?
Super Sonic ?
Snuff Soul ?
Segaki Rice ?
Soul Drop ?
Chest Key ?
Tesla Coil ?
Dry Ice ?
Vanish Ball ?
Peach Seed ?
Balm of Life ?
Hiranya ?
Smart Bomb ?
Physical Mirror ?
Homunculus ?
Life Stone ?
Magic Mirror ?
Yashichi ?
Frost Magatama ?

Locked Chests

Item Location
Death Scudetto ?
Red Battlesuit ?
Peach Battlesuit ?
Amaterasu Fob ?
Storm Vow ?
Storm Pin ?
Safety Belt ?
Disguise Mask ?
Wind Suppressor ?
Patient Collar ?
Spirit Hachimaki ?
Steed Strap ?
Cool Beads ?
Black Cat Charm ?
Ice Suppressor ?
Sigma Drive ?
Blessed Hands ?
Disinfectant ?
Falcon Eye ?
Black Feather ?
Moon Potpourri ?
Earth Badge ?
Awareness Note ?
Iron Charm ?
White Feather ?
Sorcerer's Mark ?
Volt Vow ?
Volt Pin ?
Fire Suppressor ?
Blizzard Vow ?
Blizzard Pin ?
Tranquil Buddha ?
Healthy Recipe ?
Reprisal Chain ?
Blaze Vow ?
Blaze Pin ?
Maneki Neko ?
Book of Serenity ?
Bravery Vessel ?
Volt Suppressor ?
Ryumyaku Brace ?
Kid's Hachimaki ?
Soma ?
Soul Food ?
Chewing Soul ?
Bead ?
Bead Chain ?

Persona 4 Golden Gameplay

Maps

  • The entrance map is called the Secret Laboratory Entrance
  • Each map is called a basement floor and they are numbered B1F through B9F
  • Fixed Layouts: B4F (Mini-Boss), B6F, and B9F (Boss)

Encounters

Name Arcana Level Notes
Rainy Brother 1 Strength 44 Rain Spawn
Rainy Sister 1 Chariot 44 Rain Spawn
Insolent Basalt Chariot 45
Source Basalt Strength 45
Constancy Relic Empress 46
Flattering Hablerie Magician 47
Inviting Nyogo Strength 47
Royal Dancer Lovers 47
Flowing Sand Fortune 47
Red Sigil Hierophant 48
Rainbow Twins Hierophant 48 Rain Spawn
Dogmatic Tower Hierophant 48
Dismayed Panzer Chariot 48
Shallow Okina Hermit 49
Furious Gigas Strength 50
Opulent Hand Magician 50 Rare Spawn
Mighty Beast Strength 50
Raindrop Musha Strength 51 Rain Spawn
Chaos Fuzz Hierophant 51
Wild Drive Chariot 51
World Balance Fortune 52
Fail Gene Fortune 52
Immoral Snake Lovers 52
Mach Wheel Chariot 52
Order Giant Justice 53
Wicked Turret Chariot 53
Mind Dice Fortune 53
Fierce Cyclops Hanged Man 53
Truth Pesce Priestess 53
Power Castle Emperor 54
Jotun of Power Hanged Man 54
Elegant Mother Empress 54
Hell Knight Emperor 55
Dominating Machine Justice 57

Bosses

Name Arcana Level Notes
Dominating Machine (Mini-Boss) Justice 53 Mini-Boss
Shadow Naoto Fortune 55 Boss
Extreme Vessel Chariot 57 Optional Boss. Oct 12th onwards.

Shuffle Time: Skill Cards

Rank Area(s) Skill Cards
3 1-8 Assault Dive, Kill Rush, Twin Shot, Gale Slash, Rampage, Swift Strike, Cell Breaker, Brain Shake, Agilao, Bufula, Zionga, Garula, Mahama, Mamudo, Poison Mist, Tentarafoo, Valiant Dance, Foolish Whisper, Evil Smile, Old One, Anima Freeze, Media, Me Patra, Recarm, Fire Break, Ice Break, Wind Break, Elec Break, Dodge Physical, Dodge Fire, Dodge Ice, Dodge Wind, Dodge Elec, Fire Boost, Ice Boost, Elec Boost, Wind Boost, Counter, Regenerate 1, Invigorate 1, Growth 1, Apt Pupil
4 1-8 Power Slash, Cruel Attack, Crazy Chain, Mind Slice, Seal Bomb, Megido, Life Drain, Spirit Drain, Stagnant Air, Diarama, Matarunda, Masukunda, Marakunda, Dekunda, Matarukaja, Masukukaja, Marakukaja, Dekaja, Revolution, Red Wall, White Wall, Blue Wall, Green Wall, Trafuri, Null Poison, Null Dizzy, Fast Heal
5 1-8 Fatal End, Black Spot, Mighty Swing, Herculean Strike, Heat Wave, Atom Smasher, Maragion, Mabufula, Mazionga, Magarula, Amrita, Resist Fire, Resist Ice, Resist Elec, Resist Wind, Survive Light, Survive Dark, Evade Physical, Evade Fire, Evade Ice, Evade Wind, Evade Elec, Counterstrike, Growth 2
6 1-8 Torrent Shot, Vicious Strike, Blade of Fury, Aeon Rain, Poison Arrow, Mustard Bomb, Navas Nebula, Agidyne, Bufudyne, Ziodyne, Garudyne, Hamaon, Mudoon, Diarahan, Mediarama, Energy Shower, Samarecarm, Resist Physical, Endure Light, Endure Dark, Hama Boost, Mudo Boost, High Counter, Regenerate 2, Invigorate 2, Divine Grace, Cool Breeze
7 3-8 Gigantic Fist, Tempest Slash, Deathbound, Arrow Rain, Virus Wave, Maragidyne, Mabufudyne, Maziodyne, Magarudyne, Mahamaon, Mamudoon, Ghastly Wail, Tetraja, Endure, Fire Amp, Ice Amp, Elec Amp, Wind Amp, Ailment Boost, Auto-Tarukaja, Auto-Rakukaja, Auto-Sukukaja, Firm Stance

Shuffle Time: Personas

Level Arcana Persona Area(s)
34 Empress Gorgon B1+
34 Moon Yamata-no-Orochi
34 Emperor Setanta
36 Hierophant Flauros
36 Death Samael
37 Priestess Parvati
37 Devil Pazuzu
38 Justice Dominion
39 Hanged Orthrus
39 Magician Dis
40 Temperance Genbu
40 Sun Yatagarasu
41 Emperor Okuninushi
41 Moon Alraune
41 Hermit Hitokoto-Nushi
42 Strength Hanuman
43 Chariot Triglav
43 Star Fuu-Ki
44 Devil Succubus
44 Empress Gabriel
45 Hierophant Hokuto Seikun
45 Emperor Thoth
46 Fool Decarabia B3+
46 Death Mot
47 Magician Rangda
47 Temperance Seiryu
47 Sun Narasimha
48 Priestess Kikuri-Hime
48 Moon Girimehkala
48 Hermit Kurama Tengu
49 Justice Throne B3+
(Excluding B5)
50 Strength Kali B7+
50 Star Ganesha
51 Emperor Pabilsag
52 Hierophant Cerberus
52 Empress Skadi

Items

This section is a stub. You can help Megami Tensei Wiki by expanding it.
Reason: Missing some floors

Normal Chests

Item Location
Amrita Soda BF 3, 7
Purifying Salt BF 1, 5
Purifying Water BF 4, 8
Assault Signal BF 1, 5
Cyclone Magatama BF 2, 6
Hell Magatama BF 1, 5
Diamond Shield BF 3, 7
San-zun Tama BF 2, 6
Arc Magatama BF 4, 8
Curse Paper BF 4, 8
Super Sonic BF 2, 6
Snuff Soul BF 1-8
Segaki Rice BF 3, 7
Soul Drop BF 1-8
Tesla Coil BF 1, 5
Dry Ice BF 3, 7
Balm of Life BF 2, 6
Hiranya BF 4, 8
Smart Bomb BF 2, 6
Physical Mirror BF 4, 8
Homunculus BF 1-8
Life Stone BF 1-8
Magic Mirror BF 3, 7
Yashichi BF 4, 8
Frost Magatama BF 3, 7

Locked Chests

Item Location
Red Battlesuit BF 1, 2, 7, 8
Amaterasu Fob BF 5
Storm Vow BF 2, 7
Storm Pin BF 7
Safety Belt BF 1
Volt Suppressor BF 1, 8
Wind Suppressor BF 2, 7
Cool Beads BF 2, 7
Black Cat Charm BF 5
Sigma Drive BF 2, 7
Steed Strap BF 2
Disinfectant BF 2
Soul Food BF 8
Falcon Eye BF 2, 7
Earth Badge BF 5
Chewing Soul BF 2, 7
Awareness Note BF 1, 8
Death Scudetto BF 2, 8
White Feather BF 5
Volt Vow BF 1, 8
Volt Pin BF 8
Fire Suppressor BF 5
Healthy Recipe BF 5
Bead BF 1
Bead Chain BF 5
Blaze Vow BF 5
Maneki Neko BF 1, 8
Peach Battlesuit BF 1, 7
Bravery Vessel BF 1
Black Feather ?
Blaze Pin ?
Blessed Hands ?
Blizzard Vow ?
Book of Serenity ?
Disguise Mask ?
Ice Suppressor ?
Iron Charm ?
Moon Potpourri ?
Patient Collar ?
Reprisal Chain ?
Ryumyaku Brace ?
Sorcerer's Mark ?
Spirit Hachimaki ?
Tranquil Buddha ?

Game Appearances

Persona 4

The Secret Laboratory was created due to Naoto clinging to the childish solution of being reborn through modification to fulfill the repressed dream of becoming an adult man. The floors go deeper and deeper underground, making it seem like the base of a secret organization.[1][2] After obtaining the Leader Key, the Investigation Team continues down to basement floor 9 where they find Naoto Shirogane and Shadow Naoto. Naoto rejects Shadow Naoto, causing the Shadow to transform into a robot that attacks the group. Once Shadow Naoto has been defeated, Naoto acknowledges the need to accept oneself for who you really are, and Shadow Naoto turns into the Persona Sukuna-Hikona.

If the dungeon is not cleared by the fog deadline of October 5th, then Kanji will call the protagonist and tell him that Naoto's dead body was found.

Anime Appearances

Persona 4 The Animation

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No reason provided.

Manga Appearances

Persona 4

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No reason provided.

Stage Play Appearances

Visualive Persona 4: The Evolution

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No reason provided.

Nomenclature

The "secret society" in the Japanese name originates from how the dungeon is based on the tokusatsu genre and evil organizations called "secret societies" are a common trope in shows such as Kamen Rider.

Names in Other Languages
Language Name Meaning
English Secret Laboratory
Japanese 秘密結社改造ラボ Himitsu kessha kaizō rabo Secret Society Remodeling Lab


References

  1. ↑ "「大人の男になりたい」という直斗の抑圧した願望を叶えるため、改造手術を受けて生まれ変わるという子供じみた解決策にすがったことで、この秘密結社ラボが生み出された。大人ぶっているがじつは子供っぽいという直斗の内面を反映し、少年が憧れるヒーローものをモチーフに、メカっぽいパネルやしたたる緑色の液体などで、秘密組織っぽさが演出されている。ほかのダンジョンと違い、だんだん地下に下っていく構造なのは、秘密組織は地下にあるのが定番というイメージから。" "Chapter 5: Setting", Persona Club P4, Atlus. Published by Famitsu (2009). Japanese. p. 187. ISBN-13: 475774630X.
  2. ↑ "Town Guide: TV World", Persona 4 Golden Premium Fan Book. p. 188.
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