JAKARTA - Indonesia's $80 billion Giant Sea Wall along the North Java coast will carry toll roads, mass rapid transit lines, wind turbines, and solar panels, the head of the North Java Coast Management Authority (BOPPJ) told reporters at a press briefing at the Ministry of Maritime Affairs and Fisheries in Jakarta on February 23.

“There will be a toll road and MRT on it,” BOPPJ head Didit Herdiawan Ashaf said, adding that the retention reservoir on the inner side of the wall is planned to accommodate solar panels and wind turbines. 

“We not only need to protect 17 to 20 million people, but also the entire national assets, totaling approximately $368 billion,” he added, as quoted by Indonesia’s state-owned agency Antara.

The coastal protection system covers approximately 535 kilometers across Banten, DKI Jakarta, West Java, Central Java, and East Java, spanning five cities and 25 regencies. Construction will be phased by flood risk severity, with Jakarta Bay and the Kendal - Semarang - Demak corridor identified as the most urgent zones.

A 2023 study found that major northern Javan cities including Jakarta, Pekalongan, Semarang and Demak are sinking nine times faster than the current rate of global sea level rise, with tidal flooding already a recurring condition in affected communities.

President Prabowo Subianto previously announced at the International Conference on Infrastructure at the Jakarta International Convention Center in June 2025 that the project would proceed without delay, inviting investors from China, South Korea, Japan, Europe and the Middle East while adding that Indonesia would not wait for outside participation. 

The Jakarta segment alone is estimated at $8 billion over eight years, with costs split between the central government and Jakarta's provincial administration.

Jakarta Governor Pramono Anung previously said in January 2026 that the city’s 19-kilometer section is set to begin construction in September, but noted it is still awaiting full approval from the central government. 

A month later, Didit reinforced that uncertainty, telling reporters on February 23 that construction has not yet been confirmed and that technical planning must be finalized before any work starts.