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| Rion Tech Co., Ltd. | ||||||||
| Kyushu Lion Co., Ltd. | ||||||||
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| STATE STREET BANK AND TRUST COMPANY 505103 | ||||||||
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| リオン従業員持株会 | ||||||||
| Kobayashi Institute of Science and Technology, Inc. | ||||||||
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Founded Kobayashi Riken Manufacturing Co., Ltd. (now our company) in 1944
Launched microphones (M-101) and pickups (P-101) using Rochelle salt piezoelectric vibrators
Launched Japan's first mass-produced hearing aid (H-501)
Hearing aids designated as items under the Welfare of the Disabled Law
Launched audiometers (A-1002 for hearing tests)
Established Osaka Service Station (now Nishi-Nihon Sales Office)
Launched noise meters (N-1101)
Launched transistor hearing aids (H-530), hearing test room (AT-2), and viscometers (RV-1501)
Launched nystagmometers (NY-2301)
Established Rion Metal Industries Co., Ltd. (now a consolidated subsidiary) and renamed Kobayashi Riken Manufacturing Co., Ltd. to Rion Corporation
Established Rionnet Center
Launched disc-type recording and playback device Rionocorder (RR-01)
Established Sendai Branch Office (now Sendai Sales Office)
Launched behind-the-ear hearing aids (HA-07) and piezoelectric ignition device Rionospiker (PE-01)
Launched vibration meters (VM-01)
Established Tohoku Rion Inc. (liquidated in March 2010) and launched brain wave summation device (AR-03)
Acquired and made Kyushu Rion Co., Ltd. (now a consolidated subsidiary) and launched the world's first digital noise meter (NA-10)
Received Japan's first Good Design Award for hearing aids (HA-27 series)
Established Nagoya Branch Office (now Tokai Sales Office)
Established Hiroshima Branch Office (closed in May 2002, merged into West Japan Sales Office), obtained Japan's first Type Approval for Noise Level Meter (NA-09, NA-07A)
Launched Microdust Particle Meter (KC-01)
Established Rion Electronics Industry Co., Ltd. in Taiwan (sold in October 2013)
Launched Seismometer (SM-10)
Launched world's first Transistor-type Wind Speed Meter (AM-02, AM-03), launched Automatic Noise Suppression (ANS) Hearing Aids (HA-39AS)
Successfully developed world's first Artificial Middle Ear, launched Wireless CROS Bone Conduction Glasses-type Hearing Aids (HE-72)
Launched Custom-made Hearing Aids (HI-02), waterproof behind-the-ear hearing aids (HB-35), and Japan's first Liquid Microdust Particle Meter (KL-01)
Launched world's first Waterproof Behind-the-ear Hearing Aids (HB-35PT), launched 1/N Octave Real-time Analyzer (SA-26)
Launched world's first Digital Hearing Aids (HD-10)
Obtained ISO9001 certification for Noise Level Meters
Obtained ISO9001 certification for all products except Noise Level Meters
Went public, established R.I. Limited (now Unconsolidated Subsidiary), launched Hearing Aids with 'Omakase Circuit' (HB-55S)
Acquired and made a subsidiary of Kokusai Hearing Aids Co., Ltd. (formerly Kanto Rion Co., Ltd.)
Obtained CE certification (93/42/EEC)
Obtained ISO14001 certification
Listed on the Tokyo Stock Exchange Second Section
Established Rion Service Center Co., Ltd. (now a consolidated subsidiary), established Rion Techno Co., Ltd. (now a consolidated subsidiary), opened European Representative Office in the Netherlands
Japan's first automatic hearing aid shell production system 'Rionnet Yume Mimi Kobo' in operation
Launched the world's first waterproof custom-made hearing aid (HI-G4WE), obtained ISO13485 certification, Kyushu Rion Co., Ltd. acquired Fukuoka Hearing Aid Center Co., Ltd. and made it a subsidiary
Established Rion Measuring Instrument Sales Co., Ltd. (liquidated in November 2012), established Tokai Rion Co., Ltd. (now a consolidated subsidiary), achieved a total shipment volume of 6 million hearing aids
Opened Tokyo Sales Office
Acquired and made a subsidiary Hiarink Co., Ltd. (former consolidated subsidiary Tokyo Reonnet Sales Co., Ltd.)
Established China Liaison Office in China (closed in March 2013), launched the country's first handheld OAE cleaner (ER-60)
Listed on the First Section of the Tokyo Stock Exchange, succeeded in developing the world's first biological particle counter
Established East Japan Sales Office (closed in March 2016), established Shanghai Rion Trading Co., Ltd. (now a non-consolidated subsidiary) in China
Established Shanghai Rion Technology Co., Ltd. (now a non-consolidated subsidiary) in China
Launched the world's first cartilage conduction hearing aid
Established East Japan Rion Co., Ltd. (now a consolidated subsidiary) (merged with Kanto Rion Co., Ltd. and Tokyo Reonnet Sales Co., Ltd.)
Launched the world's first wireless charging system for hearing aids, launched the world's first full cordless audiometer
Transitioned to the Prime Market of the Tokyo Stock Exchange, acquired Norsonic Corporation (now a consolidated subsidiary) and made it a subsidiary
Reion Corporation announced that it will expand its Audioscreener 2 lineup by releasing a model dedicated to DPOAE (Distortion Product Otoacoustic Emission) testing on December 14. The new model is a compact, lightweight handheld device featuring touch‑panel operation, a rechargeable battery, and wireless label‑printer functionality for test results, aiming to streamline audiological screening in otolaryngology clinics.
Rion Co., Ltd. assisted with production of TV Asahi’s “Hayashi Osamu’s What You Want to Know Now!”, scheduled to air on October 29, 2026. The program will focus on the early detection of dementia and introduce the relationship between hearing and dementia. Rion products will also appear in a segment featuring hearing aids.
On November 17, 2026, we will hold a second quarter earnings conference for institutional investors and analysts for the fiscal year ending March 2027. The venue is the Kabutocho Peace Building, and the presenters will be President Kato Koki and Executive Vice President of Corporate Planning, Irie Yusuke. The conference will cover the second quarter results and medium- to long-term outlook, followed by a Q&A session. Materials and videos will be released after the event.
We have published RION Technical Journal Vol.17 on the corporate site. RION refines diverse technologies and brings products to the world. The issue can be viewed from the banner or link on the homepage.
Rion Corporation announced its sponsorship of the 2026 World Blind Baseball Championship (WDBC) to be held in Kanagawa Prefecture in November 2026. The tournament brings together blind baseball players from around the world, promoting international exchange and development. Through its hearing aid and medical diagnostic equipment brand "RIONET", Rion is expanding its hearing healthcare business, supporting the athletes' challenges and aiming for social contribution.
The video of the 2026 March fiscal year earnings presentation can be viewed from the provided link.
Reion Corporation released the dedicated program 'NX-43RV', which adds reverberation time measurement capability to noise meters, today. This product supports not only the conventional noise interruption method but also the impulse response squared integration method, enabling the entire process from recording measurement data to calculating reverberation time and verifying reliability to be completed with a single noise meter. This reduces the burden of measurement work on site and contributes to the efficiency of indoor acoustic evaluation.
The consolidated sales for the period ended September 30, 2026 increased from 13,621 million yen in the same period last year to 14,284 million yen, and the operating profit margin improved from 4.5% to 4.9%. Ordinary profit was 2,150 million yen, and net income attributable to shareholders of the parent company was 2,185 million yen, exceeding the same period last year. Basic earnings per share were 127.91 yen, up from 117.77 yen in the same period last year.
Rion Co., Ltd. will provide free replacement hearing aids or repairs and up to two packs of hearing aid batteries per person to those affected by Typhoon No. 25 of Reiwa 8 (2026). Support is for victims in areas covered by the Disaster Relief Act and runs from September 24, 2026, through January 2027.
Rion Co., Ltd. supported an NHK General TV feature scheduled to air on September 14 on Asaichi, titled ‘Tips for Addressing Hearing Problems: Causes and Measures for Hearing Loss and Tinnitus.’ The feature will cover hearing aids, hearing aid rehabilitation, and listening difficulties, and will use Rion products.