About NAGAOKA

Established Nagaoka Watch Parts Manufacturing Limited Partnership in Otsuka, Tokyo, with capital of ¥300,000.
Eitaro Nagaoka was appointed president.

Relocated the factory to Fumishita, Tsuruoka, Yamagata Prefecture, to avoid air raids.
Continued producing pallet stones, roller jewels and cap jewels using agate and ruby.
The Tokyo factory was destroyed in the major air raid on the night of April 13.

Concluded a supply agreement with Daini Seikosha Co., Ltd. in Tsuruoka, where the company had relocated, and began doing business with the company.

Began doing business with Citizen Watch and Orient Watch.
Began commercial sales of sapphire phonograph styli.

Key Products & TechnologiesSapphire phonograph styli

Returned from Tsuruoka to Otsuka, Tokyo, the birthplace of NAGAOKA.

Key Products & TechnologiesLaunched Ronette styli

Incorporated as Nagaoka Seiki Houseki Kogyo Co., Ltd. with capital of ¥1.5 million.
Focused on research and development of sapphire phonograph styli.

Key Products & TechnologiesSapphire phonograph styli

Built a factory in Goi, Chiba Prefecture, and began producing V-stones.

Key Products & TechnologiesLaunched record spray; V-stones

Key Products & TechnologiesLaunched ruby and sapphire fountain pens with ruby or sapphire tips

Moved the factory from Goi to Kawaguchi.

Completed Japan's first replacement diamond stylus using natural white diamond.
Nagaoka Seiki Houseki Kogyo Co., Ltd. entered a period of rapid growth.

Key Products & TechnologiesReplacement diamond styli

Began doing business with Tokyo Shibaura Electric, Hitachi, Riken Denkei and others.
Laid the foundations to become an early exporter of jeweled phonograph styli.

Expanded exports through trading companies.

Established a production management department to strengthen manufacturing.

Acquired a site in Nigioka, Otsuki, Yamanashi Prefecture, and built the Otsuki factory.

Began producing various watch jewels at the Otsuki factory.

Key Products & TechnologiesVarious watch jewels

Achieved mass production of diamond styli using NAGAOKA's metal-bonded diamond manufacturing method.

Key Products & TechnologiesPortable record player

Began selling the Argent record cleaner.

Key Products & TechnologiesArgent record cleaner

Increased capital to ¥28 million.

Key Products & TechnologiesRecord cleaning spray

Established Nagaoka Plating Industry Co., Ltd. in Saitama Prefecture, with Eitaro Nagaoka as president.

Developed new products through a technical collaboration with Toshiba Research Laboratories.

Key Products & TechnologiesClear Tone record cleaning spray

Began producing and selling Ronette-type push-in styli.

Established Nagaoka Trading Co., Ltd. to strengthen exports.

Succeeded in mass-producing metal-bonded diamond styli using a new bonding method.

Completed a new reinforced-concrete headquarters and stylus factory in Otsuka, Tokyo, with one basement floor, four above-ground floors and one rooftop level.

Key Products & TechnologiesRonette-type push-in styli; metal-bonded diamond styli

Launched the world's first NR・1 ribbon-type stereo cartridge, featuring what was then the simplest power-generating mechanism.

Key Products & TechnologiesNR・1 ribbon-type stereo cartridge

Increased capital to ¥90 million.

Established Yamagata Nagaoka Co., Ltd. in Higashine, Yamagata Prefecture, with Eitaro Nagaoka as president.

Key Products & TechnologiesBegan drilling watch jewels

Eitaro Nagaoka was appointed representative chairman of Nagaoka Seiki Houseki Kogyo Co., Ltd.

Key Products & TechnologiesBegan producing round-cut components; began manufacturing and selling magnet and ferrite products in the watch-jewel division

Renamed the company NAGAOKA Co., Ltd., with Eitaro Nagaoka as representative chairman and Eiichi Nagaoka as representative president.
Established Jeltone Co., Ltd., with Eiichi Nagaoka as representative president.

Merged with Nagaoka Trading Co., Ltd.

Completed Yamagata Nagaoka's second factory.

Key Products & TechnologiesLaunched the Hi-Clean stylus cleaner

Chairman Eitaro Nagaoka received the Order of the Sacred Treasure, Fourth Class.

Built a new six-story headquarters on the site of the former Tokyo factory. Increased capital to ¥100 million.

Key Products & TechnologiesBegan producing diamond tips for phonograph styli

Increased capital to ¥140 million.

Completed the Ultra EX quadraphonic phonograph stylus through a technical partnership with Toshiba Research Laboratories.

Key Products & TechnologiesUltra EX quadraphonic phonograph stylus

Developed and launched styli with solid-black cantilevers.

Discontinued watch-jewel drilling.

Key Products & TechnologiesBegan producing Sapphire and Ultra styli; Rolling Cleaner

Key Products & TechnologiesBegan vapor-deposition processes and production of Deluxe styli.

Chairman Eitaro Nagaoka passed away.

Began producing Ultra F and EX styli and assembling Ronette styli.

Key Products & TechnologiesAnnounced the JT-R II, a premium model of the NR-1 ribbon-type stereo cartridge

Presented the ribbon cartridge to the public for the first time at the Harumi Audio Fair.
Its technology and distinctive sound impressed many audio enthusiasts.

Key Products & TechnologiesLaunched the JT-RⅢ ribbon cartridge and the Statban record cleaner.

Began producing all-metal, jewel-tipped styli.
Launched the MP cartridge series.

Key Products & TechnologiesMP cartridge series; ribbon cartridges

Began accepting orders for the top-of-the-range JT-RⅢ/D ribbon cartridge.
Began producing contact styli.

Key Products & TechnologiesJT-RⅢ/D ribbon cartridge

Completed the Yamagata Nagaoka Cultivation Center.
Began selling stereo earphones.
Began prototyping VDS (CED system).

Key Products & TechnologiesPN-100 dynamic stereo earphones

Merged with Jeltone Co., Ltd.

Achieved monthly production of one million diamond phonograph styli.

Began producing diamond melee.

Key Products & TechnologiesDiamond melee

Began producing fully finished phonograph cartridge styli.

Discontinued NAGAOKA's production division and transferred all affiliated companies to Yamagata Nagaoka.

Opened Yamagata Nagaoka's Tokyo office.

Began mass production of cutter blades.

NAGAOKA Co., Ltd. underwent a solvent liquidation.

Key Products & TechnologiesBegan producing Tokin drilling styli

Nagaoka Seimitsu Co., Ltd. and Nagaoka Trading Co., Ltd. commenced operations.

Began selling 8 cm single-CDP cases. The 8 cm single-CDP became a major hit.

Key Products & Technologies8 cm single-CDP cases; CD lens cleaners

Began selling portable players.

Key Products & TechnologiesAP-100 portable player

Released a selection of 30 NAGAOKA original classical CDs with PILZ of Germany.
Began producing square-point cutting tools and PN products.

Key Products & TechnologiesPILZ CDs

Resumed recruiting new graduates at Yamagata Nagaoka.

Launched CD Pon, a patented product that makes CDs easier to remove from their cases.

Key Products & TechnologiesCD Pon; CD/DVD carrying cases

Moved Yamagata Nagaoka's Tokyo office to Sendagaya.

Held the groundbreaking ceremony for Yamagata Nagaoka's new factory.

Renamed Yamagata Nagaoka Co., Ltd. as NAGAOKA Co., Ltd. Completed a new factory in Higashine, Yamagata Prefecture.

Began selling UNESCO classical CDs.

Key Products & TechnologiesUNESCO classical CDs

Launched the patented CD/DVD Smart Case.

Key Products & TechnologiesCD/DVD Smart Case

Launched a slim, fish-shaped CD case to an enthusiastic response.

Key Products & TechnologiesSlim, fish-shaped CD case

Launched a series of NAGAOKA-branded stereo earphones and headphones.

Key Products & TechnologiesStereo earphones and headphones

Upgraded the NAGAOKA MP cartridge series.

Key Products & TechnologiesMP cartridge series

Expanded NAGAOKA's headquarters and factory.

Hideki Nagaoka was appointed representative president of NAGAOKA Co., Ltd.

Further strengthened manufacturing and quality-control systems.

Launched NAGAOKA original cassette tapes in 10-, 20-, 60-, 90- and 120-minute lengths.

Key Products & TechnologiesNAGAOKA original cassette tapes

Began selling the B2-PF20 file for B2-size posters.

Key Products & TechnologiesB2-PF20

Kae Nagaoka was appointed representative president of Nagaoka Trading Co., Ltd.

Kae Nagaoka was appointed representative president of Nagaoka Seimitsu Co., Ltd.

Kae Nagaoka was appointed representative president of NAGAOKA Co., Ltd.
Launched the Record Rediscovery Project.

Key Products & TechnologiesLaunched VINON earphones

Launched the new MOVIO brand.

Launched a dashcam.

Key Products & TechnologiesR1 earphones, the world's first to use ruby in an acoustic filter
Launched YPO1 in collaboration with Yoshida & Co.'s PORTER brand
MDVR102HD dashcam

Completed NAGAOKA's new headquarters in Yoyogi, Tokyo.

Key Products & TechnologiesLaunched BT808 true wireless Bluetooth earphones

Launched the P908 high-resolution stereo earphones.

Key Products & TechnologiesP908

Launched the new LUSVY brand.
Celebrated the 80th anniversary of NAGAOKA's founding.

The JEWELTONE JT-80 received a Good Design Award.

Key Products & TechnologiesJEWELTONE JT-80

Participated in Tokyo Girls Collection 2021 A/W.

The MP cartridge series received the 2021 Good Design Long Life Design Award.

Key Products & TechnologiesMP cartridge series

Exhibited for the first time at Munich High End Show 2022 in Germany.

Exhibited for the first time at Paris Audio Video Show 2022 in France.

Exhibited for the first time at The Bristol Hi-Fi Show in the UK.

Expanded its booth at Munich High End Show 2023 in Germany.
Launched the Stylus DJ-44G, compatible with the SHURE M44G/7.

Key Products & TechnologiesStylus DJ-44G

Exhibited at Munich High End Show 2024 in Germany.

Launched the world's first MP-MONO cartridge.

The MP-200 received an award from the UK audio magazine What Hi-Fi?.

Key Products & TechnologiesMP-MONO; MP-200

Exhibited at AXPONA 2025 in the United States.

Exhibited at Munich High End Show 2025 in Germany.
Launched the new MP-700 cartridge.

The MP-700 won the Best Cartridge award at the EISA Awards 2025–2026.

Key Products & TechnologiesMP-700

Exhibited at AXPONA 2026 in the United States.

Exhibited at High End Show in Vienna 2026 in Austria.