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日興ヤマウ中部販売株式会社
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東播商事株式会社
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株式会社サンズ
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Established Kagawa Block Industrial Co., Ltd. at 124, Oomachi, Murayama Village, Kida District, Kagawa Prefecture (now Takamatsu City, Murayama Town). Began manufacturing and selling hollow concrete blocks.
Established Kagawa Block Industrial Co., Ltd. at 124, Oomachi, Oomachi, Mure Village, Kida District, Kagawa Prefecture (now Mure Town, Takamatsu City). Began manufacturing and selling hollow concrete blocks.
Changed company name to Nihon Kogyo Co., Ltd.
Relocated headquarters to 721-2, Kamifukoka Town, Takamatsu City, Kagawa Prefecture.
Obtained approval from the Japan Securities Association and registered as a listed trading stock.
Signed a basic corporate partnership agreement with Sekisui Resin Industries, Ltd.
Obtained ISO 9001 certification.
Obtained ISO 9001 certification.
Signed a basic partnership agreement with Yamau Co., Ltd.
Relocated headquarters functions to the Shido factory (Sanuki City, Kagawa Prefecture).
Established Nichi-Koh Yamau Chubu Sales Co., Ltd. (renamed Nichi-Koh Chubu Sales Co., Ltd. in October 2003).
Cancelled the retail registration with the Japan Securities Association and listed on the JASDAQ Securities Exchange.
Established Nichi-Koh Chubu Sales Co., Ltd. as the Chubu branch.
Acquired 100% of the shares of Higashi-Ha Shoji Co., Ltd. (consolidated subsidiary from April 2008).
Acquired 100% of the shares of Higashi-Ha Shoji Co., Ltd. (consolidated subsidiary from April 2008).
Renamed Sanz Co., Ltd. to Nikko Exterior Co., Ltd. and integrated the sales division of our exterior business.
Renamed Sanz Co., Ltd. to Nikko Exterior Co., Ltd. and integrated the sales division of our exterior business.
Listed on the Osaka Securities Exchange JASDAQ following the merger with the JASDAQ Securities Exchange.
Listed on the Tokyo Stock Exchange JASDAQ (Standard) following the integration of the physical market between the Osaka and Tokyo Stock Exchanges.
Established N.I.C. Co., Ltd., a joint venture sales company with Shin-Ibaraki Co., Ltd.
Absorbed Higashi-Ha Shoji Co., Ltd. and established the Hyogo factory.
Absorbed N.I.C. Co., Ltd. and established the North Kanto sales office.
Acquired part of the business of Shin-Ibaraki Co., Ltd. and established the Ibaraki factory.
Listed on the Tokyo Stock Exchange Standard market.
Acquired 80% of the shares of Hozuki Industrial Co., Ltd. and made it a consolidated subsidiary.
Acquired additional shares of Hozuki Industrial Co., Ltd. and made it a wholly-owned subsidiary.
In the construction of the "Ikoi and Learning Exchange Terrace" in Iwakuni City, Yamaguchi Prefecture, our NK Slit Side Drain II type, LD-KS, and custom-made Kasagi bench were adopted. The facility is a multi-purpose complex opened on the site of the former Iwakuni Medical Center and was completed in December 2025.
"NIKKO WORKS Ikoi and Learning Exchange Terrace Construction" adopts "NK slit side trench type 2, LDKS, custom cap wood bench, etc."
A private residence in Kisarazu City, Chiba Prefecture adopted the Shower Place "Shikakuro Stand L" from the wanGOO series. Style Garden Inc. was in charge, and the completion date was July 2026, with a delivery quantity of one unit.
NIKKO WORKS Style Garden Co., Ltd. adopts the Wan GOO Series Shower Place 'Shikakuro Stand L'.
In Marugame City, the NIKKO WORKS project around Theater Mad is progressing with a high-quality space development and civic rotary development using 300×300×60mm SAZARE fine stone eco-rolaqua and Gravel RS. The construction area is 4,120 square meters, with completion scheduled for September 2026. The project aims to improve the aesthetics and functionality of public spaces in cooperation with the Marugame City Hall.
On October 6, 2026, NIKKO announced the adoption of SAZARE fine stone eco-roller aqua and Gravel RS in the high-quality space development and civic rotary development project around Shiyata Mado (Marugame Civic Hall). This adoption aims to improve the quality of the company's civil engineering materials business.
The Slaine freestanding faucet unit and Simple Pan were installed at Exterior Land Kozoji in Kasugai City, Aichi Prefecture. Slaine features three dark gray accent lines in a modern design that complements residential exteriors. Installation was completed in June 2026.
On September 24, 2026, Nihon Kogyo Co., Ltd. announced that its Slaine and Simple Pan products had been selected for the NIKKO WORKS Exterior Land Kozoji store.
A faux-wood observation deck with Chloroguard salt-damage protection specifications was selected for the “Marine Activity Promotion Project” at Nishidōgasu Beach in Fukuroi City. One unit in a black charred-cedar finish was supplied in December 2025. Designed for an environment exposed to sea and salt breezes, it offers salt-damage resistance and durability, balancing safety with visual appeal.
According to an announcement on September 3, 2026, Nippon Kogyo Co., Ltd.'s timber-like observation deck with Chloroguard salt-damage protection was selected for a coastal revitalization and environmental improvement project. This will promote the use of salt-resistant landscape materials.