Yoshizawa LD Co., Ltd.

From founding (according to Yoshizawa Co., Ltd. history) until separation and independence.

Founder Hozawa Hidetaro established Hozawa Lead Pipe Manufacturing Co., Ltd., imported lead pipe machinery from Germany, and began manufacturing lead pipes, also establishing a new lead plate factory. (Headquarters: Toyoshima-cho, Kanda-ku, Tokyo; Factory: Kameido-cho, Jōtō-ku, Tokyo)

Acquired Izumi Lead Pipe, and as Kobe Lead Pipe Manufacturing Co., Ltd., was established at 2-Ōhashi, Nagata-ku, Kobe, Hyōgo Prefecture.

Established a branch and factory in Hōshidō, Asahi-ku, Osaka City, and began manufacturing lead pipes, lead plates, hard lead plate products, and light alloys.

Moved the Osaka branch to Sueyoshibashi Street, increased capital from 900,000 yen to 1,200,000 yen.

Relocated the Osaka branch and factory to 2-Ōmatsu-chū, Jōtō-ku, Osaka City, established machine tools, foundry, and precision machine factories, and manufactured lead products, light alloys, and other general precision machinery.

Both the Tokyo and Osaka factories were designated as management factories for the Army, Navy, and Air Force as important industries.

Changed the company name to Hozawa Lead Industry Co., Ltd.

Designated as a factory by the Ministry of International Trade and Industry as an important industry.

Merged the Osaka branch with Kobe Lead Pipe Manufacturing Co., Ltd.

Installed one lead plate rolling machine at the Osaka factory.

Added one lead pipe machine at the Osaka factory.

Established a new plastic factory at Osaka plant.

First president Yoshizawa Hidetaro received the Golden Ribbon Award for contributing to corporate development through technological improvements and other initiatives.

Established a new nuclear machinery plant at Osaka plant.

Expanded the analytical research laboratory at Osaka plant.

Osaka plant, ISO-approved factory.

Completed corrosion-resistant lead alloy hoppers.

Opened a Ube branch office on Matsuyama Street, Ube City.

Completed TY lead shot, meeting demand for special steel.

Registered with the Ministry of Construction as a construction contractor.

Opened a Nagoya branch office in Nagoya City, Minato-ku.

Opened a branch office within Mitsui Higashi Chemical Nagoya Plant.

Removed the branch office in Nagoya City, Minato-ku, and established a factory in Tokai City.

Changed the Nagoya branch office to Nagoya Factory.

Changed company name to Yoshizawa Kiko Co., Ltd.

Moved Osaka division to Hirakata City, Osaka Prefecture, and relocated lead pipe and lead sheet product factory to Daito City.

Installed continuous casting lead sheet manufacturing equipment at Daito plant.

Closed Osaka plant in Hirakata City and relocated nuclear machinery plant to Daito plant.

Expanded and relocated Ube plant from Matsuyama Town to the newly opened Tsuzaki area in Atsunomi District.

Implemented separation and division of each business unit: Yoshizawa Kiko Co., Ltd. (Chuo-ku, Tokyo) Yoshizawa Kiko East Co., Ltd. (Kashiwa City, Chiba Prefecture) Yoshizawa Kiko West Co., Ltd. (Daito City, Osaka Prefecture; Ube City, Yamaguchi Prefecture) Yoshizawa Kiko Central Co., Ltd. (Nagoya City, Aichi Prefecture)

Made Ube branch office into Ube plant.

Inherited all operations of the Nagoya factory from Yoshizawa Kiko Co., Ltd., and newly established "Yoshizawa Kiko Chubu Co., Ltd." (capital 10 million yen). Construction business license: Prefectural Governor of Aichi Prefecture (General-56) No. 27423. Permitted pipe and plumbing work, steel structure work, machinery and equipment installation work. Established a steel factory within Mitsui Higashi Chemical Nagoya Plant.

Expanded and relocated Ube plant to the newly opened Tsuzaki area in Atsunomi District.

Changed company name across the organization: Yoshizawa Co., Ltd. Yoshizawa LA Co., Ltd. Yoshizawa LD Co., Ltd. Yoshizawa LM Co., Ltd.

Developed a solid-liquid separation device (tornado-type water treatment device).

Changed company name to "Yoshizawa LM Co., Ltd.".

Received the Silver Medal of Merit from the Japanese Red Cross Society.

Established Osaka office at 4-Temmabashi, Kita-ku, Osaka City, and relocated the sales department.

Installed a continuous casting lead plate manufacturing machine and produced mesh-reinforced lead plates.

Demolished the old office and built a new office.

Introduced an automatic small lead plate rolling machine.

Relocated lead ball manufacturing equipment to Yoshizawa LM Co., Ltd.

Expanded a 320㎡ processing factory (including lead ball factory). Moved lead ball manufacturing equipment from Yoshizawa LD Co., Ltd. and started manufacturing lead balls.

Construction Ministry fire-resistant structure certified product Certification number: Fire No. 1100, TY soundproof wall.

Minister of Construction soundproof designated product Designation number: Soundproof (individual) No. 204, TY soundproof wall.

Demolished the old office and constructed a new three-story office.

Relocated and newly built Inari Shrine (Hōjō Inari Daimyojin).

Obtained ISO 14001 certification (registration number E231) for the headquarters factory and Osaka office environmental management system.

Merged Yoshizawa LD Co., Ltd. with LM, making LM the Nagoya branch of Yoshizawa LD Co., Ltd.

Merged Yoshizawa LD Co., Ltd. and Yoshizawa LM Co., Ltd., making Yoshizawa LD Co., Ltd. Nagoya Branch.

Nagoya Branch obtained Environmental Management System ISO14001 certification (registration number ER028).

Minister of Land, Infrastructure, Transport and Tourism certification, certification number QF045NP-9060, partition wall.

Approval for change of construction business registration due to merger, Minister of Land, Infrastructure, Transport and Tourism permit (General-14) No. 19941, permitting general construction, steel structure construction, interior finishing, and machinery and equipment installation.

Moved Osaka office to the same 3-Temmabashi, Kita-ku, Osaka City, due to business expansion.

Renovated the vendor office at Nagoya Branch.

Obtained JIS certification (certification number JQ0506017) for the headquarters factory.

Closure of Ube factory.

Opened a factory in Sakaimachi, Daito City.

Opened a second factory in Hino, Daito City.

Closed the factory in Sakaimachi, Daito City.

Integrated Osaka office into the headquarters factory.

Relocated the second factory from Hino, Daito City to Shindenkita Town.

Opened a branch office within Sanyo Chemical Industry Co., Ltd. Kashima Plant.

Relocated the second factory from Nitta Kita-machi to Hirano-ku, Osaka City.

Relocated the second factory from Hirano-ku, Osaka City to Yao City.

General construction business license granted by the Minister of Land, Infrastructure, Transport and Tourism (General-29) No. 19941, permitting pipe and plumbing work, steel structure work, interior finishing work, and machinery and equipment installation work.

Established a new office building.

Established a new factory building.

Withdrew ISO14001 Environmental Management System certification.