Toaru Majutsu no Index Wiki

Nanodevices (ナノデバイス Nanodebaisu?) or Nanomachines are devices whose components are at or at or close to the scale of a nanometer (10−9 meters). They are microscopic objects that are used in a variety of ways in Academy City.

Known Applications[]

  • Transmitter: The first use of the term "nanodevice" in the Toaru Majutus no Index novels. It uses the furigana that spells out Nanodevice, but its kanji can be translated as Transmitter (発信機 Hatsushinki?). It is used by Academy City to prevent against the abduction of students by possible agents or spies when they leave Academy City premises.[1] As it's name suggests it most likely transmits a signal which indicates where the student is.
    However, it is also used for other things such as sending a command to the transmitter that can shut down the organs of its host, as what happened with Sunazara Chimitsu.[2] It can also act like bugs that can be implanted on a person's body or clothes. As Kumokawa Maria demonstrates, it can be destroyed through heat.[3]
  • Mimosa: The Mimosa can be referred to as nanodevices despite not having circuitry or power. They can be more accurately described as nano-sized reflective alloy.[4]
  • UNDER_LINE: Only about a 70 nanometers in diameter, these minuscule machines that make up the UNDER_LINE network that is spread all over Academy City, acting as a direct line of information to the Windowless Building allowing Aleister Crowley to survey anyone and anywhere in the city he chooses.[5]
  • Type: Mosquito: Baba Yoshio's robotic mosquito can insert nanodevices into a human, incapacitating them.[6] It probably uses a Mosquito Needle, and moreover, seems to use a somewhat similar nanotechnology that incapacitated Sunazara Chimitsu. Yoshio notes that the nanodevices are expensive.
  • Medical purposes: Mugino Shizuri teases to Hamazura Shiage that she may have been revived through nanodevices. It can be assumed that there is technology which uses nanodevices for medical purposes.[7]
  • Parasite Hardware: Nanomachines used by Kihara Hasuu to infect computer networks.[8]

External Links[]



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Academy City
Inhabitants Faculty and Staff Students
Factions and Organizations Board of Directors (Board Chairman) • JudgmentAnti-SkillCooperative InstitutionsUseful SpiderSkill-Out
Locations School Districts School District 1 (Administration) • School District 2 (Military & Law Enforcement Training) • School District 3 (Outsider Accommodation) • School District 4 (Food) • School District 5 (Universities and junior colleges) • School District 6 (Recreation) • School District 7 (Middle & High Schools, Student Accommodations, Hospitals) • School District 8 (Faculty Accommodation) • School District 9 (Industrial and fine arts) • School District 10 (Reformatory, Nuclear Research, Cemetery) • School District 11 (Goods transfer) • School District 12 (Theology) • School District 13 (Kindergarten and primary schools) • School District 14 (Overseas Students) • School District 15 (Shopping & Mass Communication) • School District 16 (Commerce) • School District 17 (Industry) • School District 18School District 19School District 20 (Sports and athletics) • School District 21 (Water storage & Observatory) • School District 22 (Underground development) • School District 23 (Aerospace)
Other Notable Locations School District 7: Windowless BuildingHeaven Canceller's HospitalA Certain High SchoolKamijou ResidenceSchool Garden (Tokiwadai Middle School)
Other: Imaginary Number DistrictReformatoryExternal Connection Terminals
Power Curriculum Program Esper (Level 0Level 1Level 2Level 3Level 4Level 5Level 6 (SYSTEM)) • Personal RealityEsper AbilitiesAIMSystem ScanLevel 6 ExperimentsParameter List
Notable Technology Tree DiagramHikoboshi IIBankAirshipCleaning RobotSecurity RobotWind TurbinePowered SuitNanodeviceSupersonic Passenger PlaneHard Science
Events (Timeline) Regular DaihaseisaiIndependence DayIchihanaransaiSummer City Flood Prevention ProgramAnti-Crime Orientation
Other 0930 IncidentInterceptor ShowAvignon Cleanup OperationWorld War IIIDecember Heatwave48 Hours to Restore OrderEvacuation of Academy CityOperation Handcuffs
Other ScienceExperiments and ProjectsChild ErrorMagic-Science TreatyAcademy City Military
See also: Dark Side of Academy City