PT Pupuk Kujang was established on June 9, 1975 with funds of U.S. $ 260 million is a loan from the Government of Iran for U.S. $ 200 million, and Government Equity (PMP), Indonesia for U.S. $ 60 million. Loans to the Government of Iran has been settled in 1989.
Kujang Fertilizer plant first and then given the name Plant Kujang 1A with a production capacity of 570,000 tons / year of urea and 330,000 tons / year of ammonia construction is undertaken by main contractor Kellogg Overseas Corporation (USA) and Toyo Engineering Corporation (Japan). Plant Development Kujang 1A is successfully built over 36 months and was inaugurated by the President of the Republic of Indonesia on December 12, 1978.
In line with its development at the age of the older plant, bringing the consequences of the imposition of the higher maintenance costs and down time which has increased as well. Combating these problems requires substantial funds mainly for replacement and reconditioning some core equipment. To anticipate the problem of PT Pupuk Kujang has prepared an action plan so that the continuity of the business can continue running. One plan that was implemented was the replacement of the urea reactor in 2001 and construction of factory Kujang 1B. Plant Development Kujang 1B with a production capacity of 570,000 tons / year of urea and 330,000 tons / year of ammonia carried by the main contractor Toyo Engineering Corporation (TEC), Japan and supported by two (2) contractors in the country, PT Engineering Industries and PT Inti Karya Persada technique. Plant Development Kujang 1B taken within 36 months, starting on October 1, 2003 to September 6, 2005. Apart from the equity owned by PT Pupuk Kujang, project funding is obtained from the loan Japan Bank for International Cooperation (JBIC) amounting to JPY 27,048,700,000. 1B Kujang Factory Inauguration by the President of the Republic of Indonesia on April 3, 2006.