The Johor River is the main river in the Malaysian state of Johor. The 122.7 km long river has a drainage basin of 2,636 km² and flows in a roughly north–south direction, originating from Mount Gemuruh and then empties into the Strait of Johor. Its major tributaries are the Sayong, Linggiu, Tiram and Lebam Rivers. Its banks are also known to be th…The Johor River is the main river in the Malaysian state of Johor. The 122.7 km long river has a drainage basin of 2,636 km² and flows in a roughly north–south direction, originating from Mount Gemuruh and then empties into the Strait of Johor. Its major tributaries are the Sayong, Linggiu, Tiram and Lebam Rivers. Its banks are also known to be the location of past capitals of Johor, the Johor Lama. The Sungai Johor Bridge, officially opened in June 2011, is the first bridge to span the river and is currently the longest river bridge in Malaysia.