Showa Denko

Showa Denko K.K.

Native name	昭和電工株式会社
Romanized name	Shōwa Denkō kabushiki gaisha
Company type	Public KK
Traded as	TYO: 4004
Industry	Chemicals
Founded	June 1, 1939; 85 years ago (1939-06-01)
Headquarters	Tokyo , Japan
Key people	Mitsuo Ohashi (Chairman) Hideo Ichikawa (President & CEO)
Products	Inorganics Aluminium Electronics Chemicals
Operating income	JPY 76.7 billion (2007)
Net income	JPY 1,023.2 billion (2007)
Number of employees	15,778 (2008)
Website	www.sdk.co.jp/english/

Showa Denko K. K. (昭和電工株式会社, Shōwa Denkō Kabushiki-gaisha, abbreviated as SDK), founded in 1939 by the merger of Nihon Electrical Industries and Showa Fertilizers, both established by a Japanese entrepreneur Nobuteru Mori, is a Japanese chemical company producing chemical products and industrial materials.

SDK's products serve a wide array of fields ranging from heavy industry to the electronic and computer industries. The company is divided in five business sectors: petrochemicals (olefins, organic chemicals, plastic products), aluminum (aluminum cans, sheets, ingots, foils), electronics (semiconductors, ceramic materials, hard disk drive platters), chemicals (industrial gases, ammonia, agrochemicals), and inorganic materials (ceramics, graphite electrodes). Showa Denko has more than 180 subsidiaries and affiliates. The company has vast overseas operations and a joint venture with Netherlands-based Montell and Nippon Petrochemicals to make and market polypropylenes. In March 2001, SDK merged with Showa Denko Aluminum Corporation to strengthen the high-value-added fabricated aluminum products operations, and is today developing next-generation optical communications-use wafers.

Showa Denko is a member of the Mizuho keiretsu.

Showa Denko is now known as Resonac.^[1]