PRESS RELEASE
To the Press
June 17, 2021
NejiLaw Inc.
Inactivation test result of the novel coronavirus (SARS-CoV-2) by“Dr. AiR” (Michiwaki-style UVC Irradiator) conducted at the Kitasato Institute

NejiLaw Inc. (Headquarters: Bunkyo-ku, Tokyo / President & CEO: Hiroshi Michiwaki) has conducted aninactivation performance verification test of SARS-CoV-2 (COVID-19) at the Kitasato Institute (SchoolCorporation) using the principle and device "Dr. AiR/Michiwaki-style UVC Irradiator" that instantly inactivatesviruses (Filterable pathogens) in the air. “Dr. AiR” is invented and developed by Hiroshi Michiwaki, an inventor
and the representative of NejiLaw Inc.
Date Implemented:
May 20, 2021
At Kitasato University・School of allied health sciences, Biosafety Level 3 (BSL-3)
Performance Results:“Dr. AiR” has achieved more than 99.999% (Measurement Limit Value) inactivation of SARS-CoV-2
in less than 0.5 seconds.

NejiLaw Inc. will continue collaborative research on “Dr. AiR” to further improve the usability and effectivenessof the device and better performance and practical applications of “Dr. AiR/Michiwaki-style UVC Irradiator” inthe wider society.
Co-researchers:
NejiLaw Co., Ltd.:

Hiroshi Michiwaki, President and CEO, “Dr. AiR” Inventor

The Kitasato Institute (School Corporation):
Professor Hideaki Hanaki, Kitasato University Omura Satoshi Memorial Institute,Director of Laboratory of Infection Control & Research Center,
Professor Hiderou Kitasato, Associate Professor Makoto Kubo
The state of the above verification test will be featured in the TV Tokyo program "Nikkei Special Cambrian
Palace" (featuring NejiLaw President & CEO Hiroshi Michiwaki), which will be broadcast today, June 17(Thu)
2021, from 23:06 to 23:55. Ahead of tonight's broadcast of the full story, you can also watch the short trailer
video from the official home page of this program.
"Nikkei Special Cambrian Palace" Official website URL: https://www.tv-tokyo.co.jp/cambria/

SARS-CoV-2
Dr. AiR Engine

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Not infected cells with thevirus are stained blue if they
are alive without infection.
→Blue color indicates virus
inactivation.

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“Dr. AiR-UVC” has achieved inactivation of the novel coronavirus COVID19(SARS-CoV-2) by over 99.999% (Measurement limit value) in less than 0.5
seconds.
!"#$%&'$()*&)+$,!&-*"-..-/&0$&1123/"-/&4)5&!"5/6)#7+68%0#123)%4#!"#$%&'%()*+,#-'+.#/+,)0+'#123)%4#①The exhaust port prevents the UVC emitted inside①In the center of the sterilization flow passage, UVC①The air is taken into the device through the air

the instrument from leaking outside the instrument.

sterilization lamp is installed.

intake port.

②UVC leakage prevention is provided by UVC non-

② The UVC emitted from the UVC sterilization lamp

②If bacteria or viruses are present in the air, thereflective phase difference louvers placed at thepenetrates the air and is reflected on the surface of thedevice will exterminate or inactivate them.

exhaust port.

sterilization flow passage while irradiating and sterilizing③Ultraviolet rays (UVC) is used to exterminate and③ The non-reflective phase difference louver isbacteria and viruses contained in the air in a floating state.

inactivate bacteria and viruses.

configured to block all outward UVCs from leaking③ The reflection of UVC at the inner surface of the④The intensity and duration of UVC irradiation arethrough the intake / exhaust ports.

sterilization flow passage is due to a special reflective

controlled to achieve the appropriate level required④The surface of the non-reflective phase difference

layer on the inner surface of the sterilization flow passage,for virus inactivation.

louver has a non-reflective structure to prevent UVC

which reflects UVC at a high level.

⑤In order to obtain the appropriate intensity andreflection, thus preventing leakage of reflected UVC④The UVC that hits the reflective layer is reflected without

duration of UVC irradiation, the air is drawn into

to the outside.

much attenuation and bounces back into the sterilization

the⑤Each louver is separated from each other so thatflow passage.

sterilization flow passage.

air can pass between them.

⑤ The bounced UVC still retains its sterilizing power,⑥ The⑥The non-reflective phase difference louvres allow

exterminating and inactivating any remaining bacteria

unidirectional air flow from intake to exhaust, andair to pass through but block the passage ofand viruses.

controls the residence time of the flowing air in theultraviolet rays.

⑥ Since the reflection of UVC on the surface of thesystem appropriately.

deviceandpassedsterilization

flowthroughapassage

createssterilization flow passage occurs over and over again in
higher order. By overlapping with the newly emitted UVCs
from the UVC sterilization lamp, the multiple UVCs willsupercharge the UV density of the space inside thesterilization flow passage.

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specialaUV リフレクションシステム
NejiLaw Inc., headed by inventor Hiroshi Michiwaki, has invented, has developed, and manufactured the L/R Neji,
ZaLoc, JicLoc, ShuLoc, and other "Multifunctional, high performance joint fastenings", as well as the "smartNeji"remote monitoring system, the "CB-zeRO" bubble-less concrete production technology, and the "JicLoc &ShuLoc" high performance segment joints for shield tunnels. Under originally integrated and comprehensive inhouse system with speedy inventive problem-solving for research /development /construction of mass
production technology, and quality control, NejiLaw Inc. will continue to contribute to the society in a broader
way with our "Emergent Properties".

NejiLaw Inc.
President & CEO

Hiroshi Michiwaki

Headquarters

Shoei Building 4F, 3-23-14 Hongo, Bunkyo-ku, Tokyo

Established

July 2009

Business Activities
CapitalDevelopment, manufacturing, sales and licensing of
high-functionality/high-performance industrial fastenings
JPY 499,000,000

URL

http://www.nejilaw.com

Public Relations

info@nejilaw.com