Air transportation is in dynamic and continuous development as a means to connect people from around the world, for transporting commercial goods, and as bonds to tie people and organization together along with the wide spread use of IT based communications. In order to further improve and facilitate safe and smooth operation of air transportation, existing airports are being enhanced, new airports are being planned and built, air routes are being developed, and satellite technologies are in place to realize advanced air traffic management (ATM) systems.

In order for these plans to be implemented in a timely manner, it is considered important to actively propose and implement new systems that are based on and supported by latest advancements and rapid innovation in satellite technologies, such as represented by the Global Navigation Satellite System (GNSS) technology.

Our company is a consulting firm, established by calling up together the most prominent engineers in the field of aeronautics and in other advanced technology fronts in Japan, for the purpose of meeting the strong demand in air transportation as described above.

Company Name


Aviation Systems Consultants Co., Ltd. ("ASCO" for short)



Kotobuki Building 8F, 2-5-21 Toranomon, Minato-Ku, Tokyo, 105-0001 Japan
Telephone: +81-3-6206-6468
Facsimile: +81-3-6206-6469



President: Dr. Eiich Chaki (Registered Professional Engineer)
Senior Managing Director: Toru Shimada
Managing Director
: Kumiko Tajiri
(Registered Professional Engineer
Managing Director
: Koichi Kawamoto
Managing Director
: Toshio Yamada
Managing Director
: Teruyoshi Sueyoshi
: Katsuji Wada



Prof. & Dr. Moriyuki Mizumachi
The Chairman of All Weather Landing System Committee Japan,
Professor Emeritus of Tokyo University)

Staff Members


30 Engineers

Registered Professional Engineer:


Doctor of Engineering:


Licensed Electrical Engineer:


Airspace Design Specialist:


1st Class Radio Engineer (Japan):


1st Class Radio Operator (Japan):


Engineers (University-educated):


(CNS/ATM and IT technology specialists)


Major Customers


Civil Aviation Bureau, Ministry of Land, Infrastructure and Transport (Headquarters, Tokyo Regional Civil Aviation Bureau, and Osaka Regional Civil Aviation Bureau)
Kanto Regional Development Bureau, Ministry of Land, Infrastructure and Transport
Electronic Navigation Research Institute
Aeronautical Safety College
Japan Meteorological Agency
Japan Bank for International Cooperation (JBIC)
Japan International Cooperation Agency (JICA)
Department of Transportation and Communications (DOTC), Republic of the Philippines
Japan Transport Cooperation Association (JTCA)
Narita Airport Authority
Japan Radio Air Navigation Systems Association (JRANSA)
Tokyo Metropolitan Government, Hyogo, Kumamoto, Hiroshima, and Yamaguchi Prefectural Governments, and other local municipal governments
Toshiba Corporation, NEC Corporation, Mitsubishi Electric Corporation, and other manufactur
ing companies

Major Services


The company offers consulting, feasibility study, preliminary design, basic design, and implementation design services in the following fields:

(1) Airport Development
(2) Overseas Airport
Development Projects
(3) The New CNS/ATM Systems
(4) Other Study, Research, and Consultancy Services
- Radio wave interference analysis
- IT based solutions
- Environmental protection and new energy applications
- Aviation Security
- SMS (Safety Management Systems)

Contact us:


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