The Malaysian state of Sarawak lies to the west and south with the Asam Paya oil field to the southwest.

[6] Moreover latter that year, British Malayan Petroleum Company constructed a telephone line along the Kuala Belait Beach which linked up Seria and Rasau with their main headquarters in Kuala Belait.

[11][12][13] Rasau gained prominence in the latter half of the 20th century when a bridge was built across the Belait River providing a route to Miri in Sarawak, Malaysia without the need for any ferry crossings across the Belait River.

However, the bridge was not opened until after a family of Malaysians drowned at the ferry point during heavy rain.

The modern day Kampong Rasau serves as a suburb of the nearby Kuala Belait.

A shipyard,[15] on the opposite bank from the Port of Kuala Belait at Kampong Sungai Duhon in Rasau, is a major source of employment for the people from the village and the greater Kuala Belait area.

The Anduki Airfield in Belait District is the nearest private heliport owned by BSP.