About Us

Messages from the President

For more than 45 years since its establishment, OTO has supported customers in acoustic planning, sound and vibration countermeasures as a group of specialists in all fields related to "sound and vibration".

In particular, our company continues to focus on providing engineering capabilities that we are not ashamed of as a group of specialists.

More than 60% of our engineers are certified environmental metrologists, and all are working toward becoming certified. Each of our engineers, who are well versed in their respective fields, is involved in projects in every direction, creating a system that allows us to effectively demonstrate the collective strength of our group of specialists. Thanks to this, we have received numerous requests over the years from many of our clients, and the number of requests we handle each year has reached over 700.

We always ask our clients about their objectives and subsequent plans, no matter what the request is, in order to set them on a path to effectively achieve their goals. We not only conduct the requested research and measurements, but also provide expert advice to help our clients develop appropriate measures and stories to address their issues and concerns.

We hope that our customers will continue to make use of us as a partner in "sound and vibration", not only for survey measurements, but also for proposing countermeasures and consulting based on the results.

OTO Acoustic Engineering Associates LTD.
President  Masahiko Kishimoto


Born in Osaka Prefecture
Graduated from Department of Architecture, Faculty of Engineering, Mie University
1991 Joined OTO Acoustic Engineering Associates LTD.
Engaged in on-site environmental noise, road noise, sound insulation measurement and consulting, as well as investigation and countermeasure consulting for abnormal sounds.
2020 Appointed as President of OTO
2016 - 2020 Part-time lecturer at the Faculty of Architecture, Mie University
2018 - 2022 Councilor of The Institute of Noise Control Engineering of Japan

Corporation Profile

Company Name OTO Acoustic Engineering Associates LTD.
Osaka Head Office 6th floor Torishima Office One Building, 1-5-2 Temma, Kita-ku, Osaka, JAPAN 530-0043
TEL:+81-6-6881-1401 FAX:+81-6-6881-1403
Tokyo Branch Office 6th floor Nakagawa Building, 3-31-1 Yushima, Bunkyo-ku, Tokyo, JAPAN 113-0034
TEL:+81-3-5812-7401 FAX:+81-3-5812-7403
Board of Directors President Masahiko Kishimoto
Tokyo Office Director Tatsuro Mukai
Establishment Day September 19th, 1974
Capital 35 million Yen
Website https://oto-giken.co.jp/
Registration Measurement Certification Business Osaka Prefectural Governor Registration No. 10048
(Sound Pressure Level)
No. 10220
(Vibration Acceleration Level)
First-class Architect Office Tokyo Governor Registration No. 59445
Technical Advisors Professor Emeritus Masayuki Morimoto of Kobe University
Professor Emeritus Yasuhito Kawai of Kansai University

Measurement, Investigation and Analysis
Measure, investigate, and analyze noise, vibration, and infrasound
Measurement certification for sound pressure level and vibration acceleration level

Noise and Vibration Prevention Design
Plan and design to prevent noise, vibration, and infrasound

Environmental Prediction and Evaluation (Assessment)
Predict environmental impact predictions and environmental plans associated with urban and regional development plans, road and factory construction plans, etc.

Room Acoustics Planning and Investigation
Design and testing of room acoustics and electroacoustics for auditoriums, conference rooms, broadcasting studios, school facilities, etc., and planning, design, and testing of acoustic experiment rooms (reverberation room, anechoic room)

Performance Test and Others
Investigative research such as model experiments
Acoustic performance and vibration property tests for various buildings and facility equipment plants

Membership Acoustical Society of Japan (ASJ)
The Institute of Noise Control Engineering of Japan (INCE/J)
Architectural Institute of Japan (AIJ)


September 1974 Established in Higashi-ku, Osaka
October 1974 Registered as a First-class Architect Office with Governor of Osaka Prefecture
April 1976 Registered as a Measurement Certification Business (Noise Level) in Osaka Prefecture
October 1989 Opened Tokyo office (Bunkyo-ku, Tokyo)
November 1993 Registered as a Measurement Certification Business (Sound Pressure Level) in Osaka Prefecture
February 1994 Registered as a Measurement Certification Business (Vibration Aceleration Level) in Osaka Prefecture
June 2014 Registered as a First-class Architect Office with Governor of Tokyo
July 2015 Relocated the head office to the current location (Kita-ku, Osaka)