2027 Q3 Half-Year Report Publication
KOA Corporation released the half-year report for the fiscal year ending March 2027. The report was announced on November 6, 2026, and includes product news, events & announcements, and IR news.
KOA Corporation
KOA株式会社
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Basic information
- Head office
- Headquarters (Earthwing): 14016 Oaza Nakamiwa, Miwa Town, Kamiina District, Nagano Prefecture 399-4697, Japan. Inside KOA Pine Park: Main Store: 3672 Arai, Ina City, Nagano Prefecture 396-8585, Japan.
- Chief executive
- Koichi Mukoyama
- Capital
- 6,033,160,000 (60 100 million)
- Employees (non-consolidated)
- 1,679 people
- Employees (consolidated)
- 4,288 people
- Start date
- End date
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Websites
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Business
Manufacturing and sale of resistorsManufacturing and sale of temperature sensors and thermistorsManufacturing and sale of fuses and varistorsManufacturing and sale of LTCC wiring boards and hybrid ICsManufacturing and sale of inductorsManufacturing and sale of resistors for space developmentManufacturing and sale of airflow measurement systemsManufacturing and sale of shunt current sensorsManufacturing and sale of sulfide reaction chipsManufacturing and sale of check terminals and related productsProviding product information, technical support, and FAQsDevelopment, manufacturing, and sale of various electronic componentsManufacturing and sale of electronic components (resistors, inductors, fuses, varistors, LTCC wiring boards, etc.)Providing design support tools and technical supportCreation and provision of application guidesCSR activities (creating a circular community model, recycling system research groups, etc.)
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Related companies
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Network
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History
In March 1940 (Showa 15), Koichi Mukoyama personally founded Kōa Kōgyōsha at 2-168 Oyama-cho, Ebara-ku, Tokyo, and began manufacturing fixed resistors.
Founded.
In December 1941 (Showa 16), Kōa Kōgyōsha established the Ina factory in Ina Town, Kamiina District, Nagano Prefecture for factory expansion.
In July 1942 (Showa 17), began manufacturing capacitors.
In October 1943 (Showa 18), established a Nagoya branch office in Nagoya City.
May 1944, designated as a factory subject to Article 2 of the Labor Adjustment Order.
April 1946, established the Kōa mark.
May 1947, designated as a major communications factory by the Ministry of Commerce and Industry. In May, reorganized into a corporation with a capital of 800,000 yen.
Established (reorganized into a corporation).
June 1947, established Tokyo and Nagoya branches.
September 1948, increased capital to 1.6 million yen (fully paid up).
November 1950, closed the Nagoya branch and established a Kansai branch in Osaka.
December 1950, changed the company name to Kōa Denko Co., Ltd.
November 1953, increased capital to 2.6 million yen (fully paid up).
June 1955, received permission for JIS-marked industrial products.
July 1955, established a Kanda sales office in Tokyo.
March 1956, increased capital to 4.8 million yen (fully paid up). In December, awarded as an excellent factory by the Minister of Labor.
February 1957, increased capital to 9.6 million yen (fully paid up).
April 1958, established the Miwa factory in Miwa Town, Kamiiwa District, Nagano Prefecture.
February 1959, established a Kawasaki branch in Kawasaki City. In July, increased capital to 19.2 million yen (fully paid up). In November, received NDS XXC6442 certification from the Defense Agency for fixed-film resistors.
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News
2027 Q3 Half-Year Report Publication
Seminar on Resistors in Power Circuits – Held on December 2
KOA Corporation will hold a free, members-only webinar on December 2, 2026. The seminar will explain the characteristics and applications of various resistors used in power circuits, highlight key considerations when selecting them, and introduce a new method for determining continuous pulse endurance. The event will be conducted in a Zoom webinar format and requires pre-registration.
Notice of Exhibiting at the Nagoya Stock Exchange IR Expo 2026
KOA Corporation will exhibit at the Nagoya Stock Exchange IR Expo 2026, held on December 4 and 5, 2026, at Fukiage Hall, Nagoya City Small and Medium Enterprise Promotion Hall. The company will hold a company information session on December 5 and offer mini-sessions and answer individual questions at its booth throughout the event. Admission is free, and advance registration is required.
Added 0402 Size to Sulfure-Resistant Jumper Resistor
KOA has added the 0402 size (0.4×0.2 mm) to its sulfure‑resistant jumper resistor "RK73Z‑RT". It uses an internal electrode material that reduces the risk of breakage due to sulfuration, expanding support for compact, high‑density applications. It is intended for use in facilities where sulfur is generated, such as hot‑spring equipment, wastewater treatment plants, and chemical plants.
Public Release of China RoHS Compliance Certificate
KOA has posted the China RoHS compliance certificate on the "Response to Environmental Hazardous Substances" page, in addition to the European RoHS and REACH guarantee certificates. The certificate can be downloaded from the website and used to confirm compliance with environmental regulations for products. The applicable products and scope can be checked in the certificate, and the content is updated as needed.
Transcription of the Q2 2027 Fiscal Year Earnings Call
Transcription of the Q2 2027 Fiscal Year Earnings Call
FY March 2027 Q2 Earnings Presentation Materials
FY March 2027 Q2 Earnings Presentation Materials
Supplementary Materials for Q2 Results of FY 2027
Supplementary Materials for Q2 Results of FY 2027
Announcement of Q2 Results for Fiscal Year Ending March 2027
KOA Corporation announced the Q2 results for the fiscal year ending March 2027 on October 23, 2026, at the Tokyo Stock Exchange.
Revision of Interim Results and Earnings/Dividend Forecasts
KOA Corporation announced the differences between the consolidated earnings forecast and actual results for the second quarter of the fiscal year ending March 2027 (interim period), as well as revisions to the full-year consolidated earnings forecast and the year-end dividend forecast.
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Sources & updates
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UPDATED2026-09-29 17:26 · Model: ggml-org/gpt-oss-20b