About Denka Co Ltd

As the parent company, Denka has continued to grow as Japan’s top manufacturer of carbide chemicals since its inception in 1915, and the launch of its petrochemical business in 1962. Denka has subsequently started the manufacture of electronic materials, pharmaceutical products and other businesses.

Mission of the company in early days

Denka was established in 1915 with an equity investment from the Mitsui group. Its mission was to domestically produce chemical fertilizers. Denka has built the base of the carbide industry of Japan, and has promoted the development of the chemical industry today.


The uniqueness of Denka lies in producing carbide and its derivatives using hydroelectric power plants and lime stone mines. While most chemical companies make chemical products from oil, Denka maintains competitive power by utilizing its own resources.

Denka has acquired the technology of ultra high temperature control, advanced spherical control, and nitride by producing carbide and fertilizers. In addition, Denka researches on organic synthesis that uses acetylene, and has cultivated chemical and physical technologies. Denka has launched various inorganic and organic products in the market. In recent years, Denka has developed an innovative technology that combines inorganic and organic technologies in the electronic material field.

Denka’s five main businesses

Life Innovation
In addition to influenza vaccines, diagnostic reagents, and macromolecular hyaluronate preparations, the Life Innovation Division aims to further expand the field through the provision of products and services that contribute to global health promotion.

Electronics & Innovative Products
The Division manufactures a wide array of products made with the complex technology of fine ceramics and organic fine chemicals. Products include heat dissipation materials, radiation boards, fluorescent materials, functional films, and adhesives.

Infrastructure & Scocial Solutions
Since the company’s establishment, the Division has manufactured carbides and inorganic matters. These materials include cement, cement additives, and corrugated pipes for urban development, and fertilizer to promote the productivity of the farming industry.

Elastromers & Performance Plastics
The Division manufactures polymers such as chloroprene rubber, synthetic styrene resin, and acetyl-based products that are used to manufacture a wide variety of items that include vehicles and household electronics, building materials, and food packaging.

Living & Environment Products
The Living & Environment Products Division manufactures a wide range of eco-friendly products that are aimed at improving quality of life. Items include rain gutters, construction materials, high functional industrial tape, food packaging materials, and synthetic fibers for wigs.

Denka’s Product

Denka Chloroprene

Denka uses limestone from its Omi Plant in a proprietary carbide-acetylene manufacturing process of Denka Chloroprene. In 1962, Denka was the first company in Japan to commercialize this specialized synthetic rubber, which is shipped worldwide. Denka Chloroprene has an outstanding durability in the automotive, civil engineering and other industries because of its resistance to oil and heat.

Electronic Materials for Thermal Applications

Denka markets numerous key heat dissipating products, including Thermal Conductive Sheet, Denka HITTPLATE and Denka AN Plate. Denka has built an unrivaled and diverse lineup that combines highly thermally conductive fillers with organic fine chemicals technologies. Denka’s goal is to create technological innovations to produce thermal solutions for the electronics industry, which demands high integration and output from devices.

Diagnostic Reagents

Denka Seiken Co Ltd develops and manufactures diagnostic drugs and reagents for influenza viruses and various types of bacteria.

Major products:
- Virus diagnostic reagents
- Bacterial diagnostic reagents
- Latex immunoserological diagnostic reagents
- Reagents for HDL and LDL cholesterol


Hardloc is a two-part acrylic adhesive developed by Denka and classified as a second-generation acrylic adhesive (SGA). Denka’s Hardloc exhibits excellent durability and is most suitable for the bonding of metals and magnets.