This article, Shinigami Research and Development Institute (Kenji Hiroshi), is the property of Kenji-Taichō, Rozeluxe, Another Poetic Spartan & Ashy.

"Fear is necessary for evolution. The fear that one could be destroyed at any moment. Thank you, Gin. Thanks to your efforts, I have finally risen to an existence that surpasses both Shinigami and Hollow."

This article, Shinigami Research and Development Institute (Kenji Hiroshi), is currently under active construction by the author(s) of whom this article's property falls under.
Shinigami Research and Development Institute (Kenji Hiroshi)
Entrance to SRDI
Name Shinigami Research and Development Institute
Kanji 技術開発局
Romanji Gijutsukaihatsu Kyoku
Organizational Information
Leader(s) Nobu Sadao
Founder(s) Kisuke Urahara
Headquarters Soul Society, Seireitei
Affiliation 12th Division, Soul Society
Purpose Research and Development

The Shinigami Research and Development Institute (技術開発局, Gijutsukaihatsu Kyoku; lit. "Technological Development Department"), otherwise known as the Department of Research and Development, was an organization within Soul Society that is attached to the 12th Division of the Gotei 13.


The Shinigami Research and Development Institute was first conceptualized by the newly-promoted Captain Kisuke Urahara of the 12th Division during the late 1800s, who later created it to advance Soul Society's aging technology under his guidance and effectively change the role of the Twelfth Division by placing the Department under his leadership.

While the Shinigami Research and Development Institute made great strives under Urahara's leadership, the Captain had to abandon his post under strange circumstances, which would be later known as the Visored Incident, where he and a several other Captains and Lieutenants were forced to leave due to a bout of forced Hollowification and ensuing Conspiracy. Without a leader, many personnel believed the Shinigami Research and Development Institute would crumble and fall in ruins. However, the Vice-President and former associate of Urahara's, Mayuri Kurotsuchi, took the responsibility of leadership after he was unanimously voted for Captaincy. Mayuri continued to faithfully serve as President well after the infamous Quincy Blood War until he eventually retired some time after, handing his esteemed titles over to Nobu Sadao, a like-minded individual and former assistant.

The Institute was famous for the development of many technologies currently employed by the Shinigami, having been a leading force in medicine, biology, chemistry, and mechanical engineering. The SRDI was relatively known for its close ties with the 12th Division of the Gotei 13, as all three of the presidents coincidentally served as the Captains respectively.

Notable Members

(† = confirmed death)

Name Job Title In Office Status
Kisuke UraharaFounder and President of the S.R.D.I.1891 A.D. - 1901 A.D.Dishonorably Discharged
Mayuri KurotsuchiVice-President of the S.R.D.I.
President of the S.R.D.I.
1891 A.D. - ?
? - ?
Nobu SadaoHead Assistant to Mayuri Kurotsuchi
President of the S.R.D.I.
? - ?
? - Current
Hiyori SarugakiHead of the Research Offices1891 A.D. - 1901 A.D.Discharged
SakataVice-President of the S.R.D.I.? - CurrentActive
AkonVice-President of the S.R.D.I.? - ?Active
Nemu KurotsuchiUnknown? - ?Retired
Rin TsubokuraChief Operator of the Communication Research Section? - CurrentActive
HiyosuPrimary Gigai Expert? - CurrentActive
Female ResearcherUnknown1891 A.D. - CurrentActive
Ōko Yushima Chief of Project Spearhead? - 1905 A.D.Dishonorably Discharged †


  • The main function of the S.R.D.I. is to research and develop new technology and spiritual tools. They have invented countless items. Throughout the day and night, experiments are conducted at the Reinō Spiritual Ability Research Facility to develop new spiritual tools and instruments. The department brings together the Soul Society's top technicians, who were recruited by Mayuri Kurotsuchi.
  • The second function of the S.R.D.I. is to measure spiritual waves and oversee communications. The Spiritual Wave Measurement Lab closely monitors the world of the living to ensure spiritual stability. The Communications Research Section oversees transmissions between the Human world and Soul Society, carrying out the other important function of the institute. If an incident occurs, things become pretty hectic, but otherwise, it is usually slow.

Research and Inventions


  • Gokon Tekkō (悟魂手甲, lit. "Soul Apprehension Gauntlet"): A glove which forcibly removes the soul from the body.
  • Denreishinki: Used for communication between Shinigami deployed in the Human World and Soul Society. Also used for Hollow detection.
  • Gikongan (義魂丸, Artificial Soul Pill) : The Shinigami Research and Development Institute has performed extensive research into the modification of souls; the results of this research were artificial souls, both in the form of "soul candy" and Project Spearhead.
  • Densoumamori (でんそうまもり, Communication Amulet): Special devices that allowed the wearers to telepathically communicate with anyone wearing a similar amulet. Specialized variants had been created for each of the Divisions.
  • Hojiku-Zai (補肉剤, Flesh-mending Drug): Derived from Mayuri's research notes, the famous "regenerative serum" the ex-Captain had previously developed. Upon injection of the green chemical, it can regrow any limbs sans the head in a matter of moments. However, the user still felt the pain normally associated with regrowing a limb. It could also be used to heal minor to moderate injuries. It was later mass-produced for use by the Fourth Division, especially by the Advanced Relief Teams.
  • Gigai Development: Maintains Gigais and developing new ones.
  • Kenpachi's Eye Patch: Developed Kenpachi Zaraki's reiatsu-absorbing eye patch.


The Shinigami Research and Development Institute is nothing more than a series of labs specializing in particular types of research. These specialized labs include:

  • Reinō Spiritual Ability Research Facility: to develop new spiritual tools and instruments.
  • Spiritual Wave Measurement Lab (電波計測研究科, Denpa Keisoku Kenkyūka, lit. "Wave Measurement Department"): closely monitors the world of the living to ensure spiritual stability. Rin Tsubokura is a member of this lab.
  • Communication Research Section (通信技術研究科, Tsūshingijutsu Kenkyūka, lit. "Communication Technology Research Department"): Oversees transmissions between the Human world and Soul Society. This lab is responsible for the development of communication technology, including soul cellphones.



Behind the Scenes



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Shinigami & Visored
Shinigami Skills
Soul Society Organizations
Soul Society Related Articles
Heisekai Organizations
Heisekai Related Articles
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