The WCA is a global network for the coal industry, comprising major coal producers from across the globe.

WCA CEO Benjamin Sporton has welcomed Berau Coal Energy's membership, noting that Indonesia is the largest energy consumer in Southeast Asia, accounting for more than 36 percent of the region's total energy demand.

(Read also: RI coal outlook based on local factors, not Trump)

"Berau's membership reflects the importance of Indonesia to the global coal industry, and we look forward to working with Berau Coal Energy as they continue to build on the commitment to provide energy for the Indonesian people," he said in a press statement received by The Jakarta Post.

"We believe that by embracing modern coal technologies, Indonesia can enjoy the reliability, stability and affordability that on-grid power provides while at the same time addressing climate concerns by significantly reducing emissions."

Meanwhile, Berau Coal Energy president director Fuganti Widjaja also expressed his enthusiasm in joining the WCA as coal was still expected to be a major energy source for Indonesia for the next decade.

Berau Coal Energy as Indonesia's fifth largest coal producer, is estimated to have a 509-million-ton coal reserve. Berau was established in 1983 and now operates three mines in Lati, Binungan and Sambarata.

Currently, Berau Coal Energy's biggest market is China, which accounts for 44 percent of the company's total sales. (bbn)

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