Strait of Johor — LLMpedia

Strait of Johor
Name	Strait of Johor
Location	Southeast Asia
Type	Strait
Outflow	South China Sea
Basin countries	Malaysia; Singapore
Cities	Johor Bahru; Woodlands, Singapore; Kota Tinggi

Contents

Strait of Johor The Strait of Johor separates the southern Malaysian state of Johor from the northern part of the Island of Singapore and connects to the South China Sea and Selat Tebrau. The waterway lies adjacent to the cities of Johor Bahru and Woodlands, Singapore and has been a focal point for regional navigation, territorial delimitation, and bilateral infrastructure projects. The strait's strategic location links maritime routes used historically by traders from Banten Sultanate, Malacca Sultanate, Majapahit Empire and later by European powers such as the Dutch East India Company, the British Empire, and the Portuguese Empire.

Geography

The strait runs along the coastal fringes of Peninsular Malaysia and the Island of Singapore, bounded by features such as Tanjung Piai, Pulau Ubin, Pulau Tekong, and the estuarine mouths near Sungai Johor and Sungei Skudai. Adjacent administrative entities include Johor Bahru District, Kulai District, Iskandar Puteri, Central Region, Singapore, and the Republic of Singapore. Cartographic surveys by institutions like the Hydrographic Office (United Kingdom) and the United States National Geospatial-Intelligence Agency have delineated navigational channels and shoals influenced by tidal regimes from the Java Sea and the South China Sea. The strait's bathymetry and shoreline have been altered by reclamation projects connected to development plans such as Iskandar Malaysia and initiatives by the Housing and Development Board and Johor Corporation.

Maritime activity in the strait traced trade networks of the Srivijaya empire, Chola dynasty, Sulu Sultanate, and later the British East India Company; historical interactions involved ports like Malacca City, Pekan, Singapore (1819–1867), and Riau Islands. Colonial-era boundary arrangements emerged from treaties involving the Anglo-Dutch Treaty of 1824, bilateral negotiations between the United Kingdom and the Sultanate of Johor, and later instruments under the Federation of Malaya and the Colony of Singapore. Military episodes and strategic planning during the World War II Pacific campaigns implicated nearby bases such as Kranji, Changi, and Johor Bahru; postwar sovereignty issues were raised in forums including the United Nations and regional councils like the Association of Southeast Asian Nations. Modern diplomatic arrangements between Malaysia and Singapore have addressed water sharing, land reclamation, and border control through mechanisms involving the International Court of Justice precedent and bilateral committees chaired by ministries including Ministry of Foreign Affairs (Malaysia) and Ministry of Foreign Affairs (Singapore).

Key fixed links across the strait include the Johor–Singapore Causeway and the Malaysia–Singapore Second Link, both integral to cross-border transport involving agencies such as Land Transport Authority (Singapore), Malaysia Public Works Department, Singapore Customs, and Royal Malaysian Police. Rail and road arteries connect terminals like Woodlands Train Checkpoint, Tanjong Pagar Railway Station (historical), Genting Expressways networks, and freight nodes serving Port of Tanjung Pelepas, Port of Singapore, Pasir Gudang Port, and logistics hubs managed by Temasek Holdings and Sime Darby. Proposals and projects related to the strait have engaged engineering firms including Hyundai Engineering, Systra, and Arup Group, and financing partners such as the Asian Development Bank and World Bank affiliates. Security and customs coordination involve entities like the Immigration and Checkpoints Authority (Singapore), Royal Malaysia Customs Department, Maritime and Port Authority of Singapore, and naval units from the Royal Malaysian Navy and Republic of Singapore Navy.

The strait's intertidal zones host mangrove stands linked to conservation areas such as Sungei Buloh Wetland Reserve, Pulau Ubin Nature Reserve, and the Kota Tinggi Wetlands. Biodiversity includes species catalogued by researchers from National University of Singapore, Universiti Teknologi Malaysia, World Wide Fund for Nature, and surveys under the Convention on Biological Diversity. Environmental pressures arise from land reclamation, dredging for ports like Port of Singapore, urban runoff from Johor Bahru, and industrial effluents from complexes such as Pasir Gudang. Monitoring has been conducted by agencies including the National Environment Agency (Singapore), Department of Environment (Malaysia), and academic programs at Nanyang Technological University and University of Malaya. Conservation initiatives involve NGOs such as Nature Society (Singapore), Malaysian Nature Society, and international bodies like BirdLife International and the IUCN.

Economic activity around the strait encompasses shipping lanes serving Straits of Malacca and Singapore shipping route, petrochemical and manufacturing zones in Pasir Gudang, Jurong Industrial Estate, and commercial centers in Johor Bahru and Woodlands. Cross-border commerce facilitated by agreements between Malaysia and Singapore supports industries linked to Tourism Malaysia, Singapore Tourism Board, A*STAR, and trade organizations like the Federation of Malaysian Manufacturers and Singapore Business Federation. Energy and utilities projects have involved corporations such as Tenaga Nasional Berhad, Singapore Power, and regional investors including Temasek Holdings and Khazanah Nasional. Financial services, insurance, and cargo operations engage institutions like DBS Bank, Maybank, OCBC Bank, Mitsui & Co., and freight forwarders collaborating with the International Chamber of Commerce.