The Jawa-1 project is the first of its kind in Indonesia and will support electricity sales in the archipelago.
The trio won the contract with state-owned electricity utility Persero to construct, own and operate Jawa-1 for an expected 25 year life.
The project has an expected completion date of 2021.
The Indonesian government has set a target to provide an additional 35GW of power capacity by 2019, and power generators are looking for international companies to come in and help meet demand in the growing economy.
Marubeni has expanded its power generation assets to over 10GW (net) in 22 nations around the world, while Sojitz has a long-standing relationship with Pertamina over nearly 40 years, starting with Sojitz's involvement in the Bontang LNG project and Arun LNG project in the 1970s.
The Jawa Satu project will be built in West Java for a cost of around $US1.8 billion ($A2.37 billion).