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| Kyoei Fire & Marine Insurance Co., Ltd. | ||||||||
| PT. RHYTHM MANUFACTURING INDONESIA | ||||||||
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| Rhythm Pretech Co., Ltd. | ||||||||
| リズムベトナムサイゴン | ||||||||
| リズム協伸株式会社 | ||||||||
| リズム時計工業株式会社 | ||||||||
| Tohoku Rhythm Co., Ltd. | ||||||||
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| アイ・ネクストジーイー株式会社 |
Rhythm Clock Industrial Co., Ltd. established. Headquarters: Minato-ku, Tokyo; Factory: Shōwa-machi, Kita-Katsushika-gun, Saitama Prefecture (now Kasukabe City).
Since its founding in 1950 as Rhythm Clock Industrial Co., Ltd., a clock manufacturer, Rhythm Co., Ltd. has built a history and technology over more than 70 years.
Established: November 7, 1950.
Released Japan's first plastic frame clock.
Citizen Watch Co., Ltd. and Citizen Trading Co., Ltd. enter into a technology, sales, and capital partnership.
Relocated headquarters to Ueno, Taito-ku, Tokyo.
Released an 8‑day marine watch.
Established Ryusui Watch Co., Ltd. (Mino‑cho, Kamiiwa‑gun, Nagano Prefecture) through joint investment by our company, Ryusui Co., Citizen Watch Co., Ltd., and Citizen Trading Co., Ltd.
Listed shares on the Second Section of the Tokyo Stock Exchange.
Opened the Masaki factory (Masaki‑cho, Haga‑gun, Tochigi Prefecture).
Introduced the ZD movement.
Signed a basic agreement on mutual use of trademarks with Citizen Watch Co., Ltd.: Developed the first domestically produced high‑frequency transistor movement (First Mecha).
Opened the Aizu factory (Aizuwakamatsu City, Fukushima Prefecture) (later integrated into Tohoku Rhythm Co., Ltd.).
Designated to the First Section of the Tokyo Stock Exchange: Became the world's leading clock producer: Released quartz watches.
Developed the world's first 4 MHz quartz movement.
Established a Consumer Consultation Office (now Customer Consultation Office).
Established Rhythm Koki Co., Ltd. (Aizuwakamatsu City, Fukushima Prefecture) (later Tohoku Rhythm Co., Ltd.).
Established Rhythm Service Co., Ltd. (Sakakichi‑cho, Makabe‑gun, Ibaraki Prefecture) (now Chikusei City).
Received the TQC Deming Award.
Launched a mechanical watch for outdoor use.
Launched a mechanical watch for indoor use: Started selling CD cameras.
Established RHYTHM U.S.A., Inc. in the United States: Released the 'Queen Elizabeth 2' series.
Established RHYWACO (H.K.) Co., Ltd. in Hong Kong.
Established RHYTHM INDUSTRIAL (H.K.) Ltd. in Hong Kong: Operated a factory in China: Released the world's thinnest movement.
Moved headquarters to Sumida-ku, Tokyo
Released the Radio Clock series
On the occasion of the 50th anniversary of establishment, donated clocks to child welfare facilities in Saitama Prefecture (subsequently held annually on 'Time Memorial Day')
Moved headquarters to Saitama City, Saitama Prefecture
Established and commenced operation of a new integrated China factory subsidiary: Founded RHYTHM PRECISION VIETNAM CO., LTD. in Vietnam; launched the first Eco-Label certified product in the Clock line
Received the first Green Procurement Law compliance certification for Clock
Established RHYTHM INDUSTRIAL (DONGGUAN) LTD.; acquired Kyoshin Industrial Co., Ltd. (later renamed Rhythm Kyoshin Co., Ltd.), KYOSHIN VIETNAM CO., LTD., and KYOSHIN INDUSTRY ASIA PTE LTD.
Established RHYTHM KYOSHIN HANOI CO., LTD.; obtained Privacy Mark certification at Rhythm Service Co., Ltd.
Acquired PT. UMEDA KOGYO INDONESIA
Acquired Pretec Co., Ltd.
Our subsidiary, Tohoku Rhythm Co., Ltd., acquired Pretech Co., Ltd.
New plant completed (Guide Building).
Transitioned to a company with an Audit Committee
Discontinued medical device manufacturing: new plant completed (Die & Molding Building).
Rhythm Clock Industrial Co., Ltd., Tohoku Rhythm Co., Ltd., and Rhythm Kyoshin Co., Ltd. merged and changed the company name to Rhythm Co., Ltd.
Celebrated the 70th anniversary: Acquired I Next GEE Co., Ltd. (liquidated in 2024); merged Rhythm Clock Industrial Co., Ltd., Tohoku Rhythm Co., Ltd., and Rhythm Kyoshin Co., Ltd. into Rhythm Co., Ltd., changing the company name
In 2020, we integrated three domestic group companies and started anew as Rhythm Co., Ltd.
Registered on the Prime Market following the Tokyo Stock Exchange market reorganization.
Established Rhythm Shoei Co., Ltd. and acquired business from Shoei Co., Ltd. (including SHOEI Electronic Component GmbH and SHOEI U.S.A., Inc.).
RHYTHM PRECISION VIETNAM CO., LTD. and RHYTHM KYOSHIN HANOI CO., LTD. merged and changed the company name to RHYTHM VIETNAM (HANOI) CO., LTD.
Changed subsidiary names: from Pretec Co., Ltd. to Rhythm Pretec Co., Ltd.; from KYOSHIN INDUSTRY ASIA PTE. LTD. to RHYTHM INDUSTRY ASIA PTE. LTD.; from RHYWACO (H. K.) CO., LTD. to RHYTHM HONG KONG COMPANY LIMITED; from KYOSHIN VIETNAM CO., LTD. to RHYTHM VIETNAM (SAIGON) CO., LTD.; from SHOEI Electronic Component GmbH to RHYTHM SHOEI GERMANY GmbH; from PT. RHYTHM KYOSHIN INDONESIA to PT RHYTHM MANUFACTURING INDONESIA.
Changed subsidiary company names: from Pretech Co., Ltd. to Rhythm Pretech Co., Ltd.; from KYOSHIN INDUSTRY ASIA PTE. LTD. to RHYTHM INDUSTRY ASIA PTE. LTD.; from RHYWACO (H.K.) CO., LTD. to RHYTHM HONG KONG COMPANY LIMITED; from KYOSHIN VIETNAM CO., LTD. to RHYTHM VIETNAM (SAIGON) CO., LTD.; from SHOEI Electronic Component GmbH to RHYTHM SHOEI GERMANY GmbH; from PT. RHYTHM KYOSHIN INDONESIA to PT RHYTHM MANUFACTURING INDONESIA; established RHYTHM NORTH AMERICA, INC.
The mid-term management plan 2027, which began in fiscal year 2025, sets the basic policy of 'realizing new growth through establishing a business model' and aims to complete the transformation efforts so far while achieving unwavering growth capable of responding to a rapidly changing external environment.
RHYTHM HONG KONG CO., LTD. absorbed RHYTHM INDUSTRIAL (H.K.) LTD.
Rhythm Corporation will run a campaign from November 6 to November 30, 2026, where followers and commenters on social media can win a set of the ultrasonic poolless humidifier MIST series (MIST Mini 2 and MIST 250). Twenty winners will receive the products, available in light gray, dark gray, and blue (Mini 2) and light gray and warm gray (250).
Due to continuous increases in raw material costs, packaging material costs, logistics costs, and other expenses, we will revise the manufacturer suggested retail price of the target products from orders placed on November 2, 2026. Please refer to the table in the document for the target products and new prices. There are no changes to the JAN code, model number, or product name.
Rizumu Corporation will release the limited quantity 'MAGSPEAKER DUO Theater Set', which combines the 'MAGSPEAKER DUO', a comfortable waterproof portable theater speaker, with the waterproof case 'MAGCASE'. The set is a product that has received multiple awards such as the iF DESIGN AWARD and GOOD DESIGN.
Rizumu Corporation is collaborating with RoomClip Corporation, which operates RoomClip, to conduct a monitor campaign for the ultrasonic pool mist humidifier "MIST Mini 2" and "MIST 250" from October 15 to 21, 2026. The application period is from 11:00 on October 15 to 23:59 on October 21, and the monitor benefit includes a set of three items (MIST Mini 2, MIST 250, essential oil). Those who keep pets should be careful of the effects of essential oils.
The Handy Fan Series from Rhythm Co., Ltd. (Silky Wind Mobile 4 and the dedicated optional clip) received the 2026 Good Design Award, hosted by the Japan Design Promotion Foundation. The judges praised the improved hands-free usability and the expanded color lineup. They noted that mobile fans have become a summer essential amid increasing heat due to climate change. Rhythm Co., Ltd. stated that it will continue to develop products that provide relaxing moments.
Rhythm Co., Ltd. will launch a disposable pre-filter set for pet owners in early October for its high-speed suction air purifier, Silky Wind Clean. The filters address airborne contaminants including pet hair and dander, pollen, and viruses.
Rhythm Co., Ltd. will begin a phased, color-by-color launch of MIST Mini 2, an ultrasonic, tankless tabletop humidifier designed for easy cleaning and use, in mid-September 2026. Its compact size fits personal spaces such as desks and bedside tables while providing effective humidification. It carries forward the design and reputation of the original MIST Mini while further developing the features of the MIST series.
Rhythm Inc. will launch a digital alarm clock featuring Kirby in early September 2026. The clock brings the world of Kirby to the entire design and features an original figure and playful LCD display. The product is timed ahead of Kirby's 35th anniversary in 2027.
Rhythm Co., Ltd. donated handheld fans and emergency radios to support people affected by the 2026 Kumamoto earthquake and those assisting them. A total of 15,500 products were provided to multiple municipalities and support organizations in Kumamoto Prefecture. The donation aims to support early recovery and relief efforts.
Rhythm Inc. is holding a campaign in which participants can enter by following and commenting on social media. Twenty winners will receive a wireless speaker and lantern clock set that can be useful in emergencies. The campaign runs from August 7 to 31, 2026.