Our specialty is security assessment know-how regarding advanced technology such as smartphone apps and IoT.

Ierae Security Inc. is a white hat hacker organization that scans security vulnerabilities, specializing in smartphone apps and web services.
As IT becomes in widespread use, risk and awareness of information leaks have risen. And the needs for these services also increase but there are not enough security engineers, so we were founded in 2011 to provide high-quality services in this area.
We want to use our expertise to help society as much as possible, and that idea gave birth to Ierae Security Inc.
Using our proprietary assessment technology we can prevent incidents before they occur, and we work to help provide safe web service use for as many users as possible.
Starting with vulnerability scanning for web apps, which are continuing to grow in demand, we also deliver vulnerability assessment services for iOS and Android apps, which have increased rapidly in popularity in recent years.
In addition to assessment services, we also continuously develop vulnerability assessment tools for large telecommunications companies. And we have plans for the development of other new services that will help a wide variety of clients.



Makoto Makita


After graduating with a degree in computer science from the engineering department at Gunma University, he formed the security assessment teams at SoftBank and CyberAgent.
Since 2010 he has taken part in CTF Challenge Japan, sponsored by METI, and he has also been a member of the Japanese team for the worldwide hacking event DEFCON CTF, where he has produced good results. In 2011 he founded Ierae Security Inc.
His security assessment track record includes more than 900 cases, and he still continues to be in charge of vulnerability assessment.

  • Technical Engineer (Network)
  • Technical Engineer (Information Security)
  • Information Security Administrator

Katsuhiko Sato

Executive Vice President

He began developing when he was in the second grade. While polishing his skills as a developer, on his own he continued working on tracking down bugs, and he has individually recorded large accomplishments, including discovering vulnerabilities in Android. Every year he participates on a team (sutegoma2 and binja) at the world’s largest hacking conference “DEFCON” in Las Vegas, and he has twice won an award. He is also active on Twitter (@goroh_kun).
In addition to working with Roland DG and Sony Digital Network Applications, Inc. he has also done freelance work, and he has shown his skills as the representative director and CEO of Ubilabo Inc. He has also done large scale vulnerability assessment in Symantec. In October of 2017, he became executive vice president of Ierae Security Inc.

Takaharu Kishiya

Board Member

He has worked in the network security field since the mid-2000s. He belonged to the largest EC service company in the country, where he formed the vulnerability assessment team. He also has many assessment experiences for websites and smartphone applications.
He is currently in charge of the Ierae Security Inc. Sapporo Laboratory, where he nurtures young engineers, as he himself continues to work in the assessment field.

  • Technical Engineer (Network)
  • Technical Engineer (Information Security)
  • Information Security Administrator

Akihiro Ito

Board Member

He joined Nifty Corporation in 2002, where he was in charge of corporate marketing. After that, he was a project manager for a variety of policy programs, including the Agency for Natural Resources and Energy’s public awareness operations for renewable energy, the Ministry of Internal Affairs and Communications’ Future School Promotion Project, and the METI Cloud Technology Southeast Asia Development Project.
He spearheaded the establishment of GLOCZUS, a joint venture between METI, INCJ, and Nifty. Supporting overseas expansion for small and medium-sized companies, he has acted as project manager for operations in Thailand, Indonesia, and Malaysia.
He joined Ierae Security Inc. in 2016. Since 2017 he has been a board member at the company.

Yoko Ishizuki

Operating Officer

Since completing graduate school at the University of Washington in the United States, her work has included activities such as starting security services for foreign telecommunications companies. After that, she did management for security engineering, worked as a presales engineer at companies such as Hewlett-Packard and Microsoft, and in September of 2018, she joined Ierae Security Inc.

  • CISA
  • CEH
  • Technical Engineer (Network)
  • Technical Engineer (Information Security)

Masaaki Chida

Operating Officer

Hiroshi Kawaguchi


In 2002 he joined a large security company.
After working on maintaining the infrastructure system within the company, he joined the security monitoring center.
From 2013 to 2016 he worked with the National center of Incident readiness and Strategy for Cybersecurity (NISC).
In addition to dealing with security incidents for the administrative agencies, he also worked on public awareness activities for citizens.
He joined Ierae Security Inc. in 2018 as an advisor.

  • Cabinet Office Minister’s Secretariat Computerization Advisor
  • MEXT Cybersecurity Advisor
  • Toyama Prefectural Police Headquarters Cybersecurity Countermeasure Advisor
  • NICT CYDER Promotion Committee Member
  • Hardening Project Executive Committee
  • Micro Hardening Producer
  • Information Security Operation Providers Group Japan Technical WG Leader
  • Security Camp Lecturer
  • LAC Evangelist

Company Overview


Company name

Ierae Security, Inc.


December of 2011

Capital Stock

51 million yen


Representative director and company president
Makoto Makita


Mizuho Bank Aoyama Branch

Area of business

Web app vulnerability assessment, smartphone app vulnerability assessment

Address of the main office

Tokyo-to, Shibuya-ku, Honmachi, 3 Chome−12−1
Sumitomo Realty & Development Nishi-Shinjuku Building, Building 6, Unit 7

Number of employees


Principle Clients

Sammy Networks
The Pokémon Company
National Institute of Information and Communications Technology
(Listed in no particular order, titles omitted)




Address:Sumitomo Fudosan Nishi-Shinjuku BLDG No. 6, Honmachi 3-12-1, Shibuya-ku, Tokyo 151-0071

Access:Toei Oedo Line “Nishi-Shinjuku-Gochome Station” 4-minute walk from A1 exit


Address:Hoosiers Sapporo Building 3rd Floor, Kita 2 Jonishi, 2 Chome-34, Chuo-ku, Sapporo-shi, Hokkaido 060-0002


Address:2-1-18, Tomari, Naha-shi, Okinawa 900-0012