The Legality of Okinotorishima’s Islandization under UNCLOS: Implications for Indonesia’s Basepoint Preservation Strategies

  • Tri Widiastuti Universitas Brawijaya, Indonesia
  • Fazal Akmal Musyarri Universitas Brawijaya, Indonesia

Abstract

The escalation of maritime realism in East Asia has driven coastal states to manipulate the characteristics of geographical features using advanced technology to expand jurisdiction, a phenomenon that has manifested in its most extreme form in the Okinotorishima dispute. This research aims to analyze the legal validity of Japan’s technological interventions to maintain Okinotorishima’s status as an island under the UNCLOS regime. Utilizing a normative legal research method within an interdisciplinary framework, this study conducts a juridical examination of Ocean City’s planning research and the mass coral propagation project (coral pegs). These technical facts are then tested dialectically using the natural condition doctrine and the jurisprudence of the 2016 PCA Award. The results show that although the concrete infrastructure and bio-engineering successfully prevent physical erosion, this success lacks legal equivalence. Such artificial modifications are considered installations that fail to meet the natural capacity requirements to sustain life, rendering the feature’s status as a “rock” not entitled to an Exclusive Economic Zone. This research identifies this practice as an Islandization strategy, a form of lawfare that uses technology to create material hegemony atop a legal legitimacy void. As a strategic implication, the research recommends that Indonesia reject such an artificial expansion model and adopt the Eco-Technological Defense paradigm. This strategy focuses on restoring the ecological functions of basepoints on outermost small islands threatened by abrasion, such as in Bengkalis and Natuna, to secure sovereignty without violating the integrity of the international law of the sea.

Keywords: Eco-Technological Defense, Islandization, Lawfare, Okinotorishima, UNCLOS

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References

Anand, A., & Forbes, L. (2021). Calming the Waters of the South China Sea: Solving Territorial Disputes over Artificial Islands. Journal of Student Research, 10(3), 1-14. https://doi.org/10.47611/jsrhs.v10i3.1797

Anisimov, I. O. (2021). Некоторые Международно-Правовые Вопросы Разработки и Передачи Морских Технологий (Some International Legal Issues in the Development and Transfer of Marine Technologies). Moscow Journal of International Law, 2021(4), 136-147. https://doi.org/10.24833/0869-0049-2021-4-136-147

Arai, Y. (2019). The Interpretation of the Regime of Islands: Application to Okinotorishima [Master Thesis, World Maritime University]. WMU Library. https://commons.wmu.se/all_dissertations/1193

Barrie, G. (2021). The 1982 United Nations Law of the Sea Convention: Unresolved Issues Remain. Obiter, 42(3), 529-546. Retrieved from https://hdl.handle.net/10520/ejc-obiter_v42_n3_a5

Bueger, C., Edmunds, T., & Ryan, B. J. (2019). Maritime Security: The Uncharted Politics of the Global Sea. International Affairs, 95(5), 971-978. https://doi.org/10.1093/ia/iiz145

Burt, J. A., & Bartholomew, A. (2019). Towards More Sustainable Coastal Development in the Arabian Gulf: Opportunities for Ecological Engineering in an Urbanized Seascape. Marine Pollution Bulletin, 142, 93-102. https://doi.org/10.1016/j.marpolbul.2019.03.024

Cahyani, H. D., Lestari, M. M., & Diana, L. (2025). The Determination of State Baselines Post-Peat Abrasion on Bengkalis Island as Indonesia’s Foremost Island in Terms of International Law of the Sea Perspective. Multidisciplinary Indonesian Center Journal (MICJO), 2(2), 1382-1401. https://doi.org/10.62567/micjo.v2i2.639

Chapman, K. C. S., Cannon, A., Nacimiento, P., Sanger, K., Tomasi, T., Leathley, C., Tevendale, C., & Satryani, G. (2012, July 5). A Rock or an Island? The Significance of Okinotorishima and Its Status under the International Law of the Sea (Arbitration Notes). Herbert Smith Freehills Kramer. Retrieved December 22, 2025, from https://www.hsfkramer.com/notes/arbitration/2012-07/a-rock-or-an-island-the-significance-of-okinotorishima-and-its-status-under-the-international-law-of-the-sea

Charney, J. I. (1999). Rocks That Cannot Sustain Human Habitation. American Journal of International Law, 93(4), 863-878. https://doi.org/10.2307/2555353

Ding, Z. (2024). Maritime Disputes from a Global Perspective and Solutions under International Law. Lecture Notes in Education Psychology and Public Media, 66, 34-42. https://doi.org/10.54254/2753-7048/66/2024mu0013

Faccio, S. (2021). “Human Habitation or Economic Life of their Own”: The Definition of Features Between History, Technology and the Law. Liverpool Law Review, 42(1), 15-33. https://doi.org/10.1007/s10991-020-09260-1

Flikkema, M. M. B., Lin, F. Y., Plank, P. P. J. V. D., Koning, J., & Waals, O. (2021). Legal Issues for Artificial Floating Islands. Frontiers in Marine Science, 8, 1-10. https://doi.org/10.3389/fmars.2021.619462

Fox, S. (2016). The Senkaku Shoto/Diaoyu Islands and Okinotorishima Disputes: Ideational and Material Influences. China Information, 30(3), 312-333. https://doi.org/10.1177/0920203X16665778

Gau, M. S. (2019). The Interpretation of Article 121(3) of UNCLOS by the Tribunal for the South China Sea Arbitration: A Critique. Ocean Development & International Law, 50(1), 49-69. https://doi.org/10.1080/00908320.2018.1511083

Guilfoyle, D. (2019). The Rule of Law and Maritime Security: Understanding Lawfare in the South China Sea. International Affairs, 95(5), 999-1017. https://doi.org/10.1093/ia/iiz141

Gunawan, Y., Dananjaya, M. P., Aditama, S. W., & Onielda, M. D. A. (2025). Indonesian Sea Sand Exports: UNCLOS Compliance v. Environmental Sustainability Dilemma Explored. Jurnal Hukum, 41(2), 394-410. https://doi.org/10.26532/jh.v41i2.32294

Hamid, A. G. (2022). The Principle That the Land Dominates the Sea in the Context of South China Sea Disputes: A Critical Appraisal. IIUM Law Journal, 30(2), 49-75. https://doi.org/10.31436/iiumlj.v30i2.742

Irwansyah. (2020). Penelitian Hukum: Pilihan Metode & Praktik Penulisan Artikel. Mirra Buana Media.

Janata, M. (2024). Vymezení Umělých Ostrovů v Mezinárodním Mořském Právu a Jeho Význam pro Spory v Jihočínském Moři (The Definition of Artificial Islands in the International Law of the Sea and Its Relevance to Disputes in the South China Sea). Acta Universitatis Carolinae Iuridica, 70(3), 143-158. https://doi.org/10.14712/23366478.2024.142

Jo, S. W., & Shim, W. S. (2019). LTE-Maritime: High-Speed Maritime Wireless Communication Based on LTE Technology. IEEE Access, 7, 53172-53181. https://doi.org/10.1109/access.2019.2912392

Katsunori, F. (2025, June 3). Interview: Director, Marine Biodiversity and Environmental Assessment Research Center, JAMSTEC. The Tokyo Okinotorishima and Minamitorishima Islands. Retrieved December 22, 2025, from https://www.t-borderislands.metro.tokyo.lg.jp/en/interview/interview26.html

Kawaguchi, S. (2021, October 14). Interview 1: Principal Researcher, Marine Environmental Impact Assessment Research Group, JAMSTEC. The Tokyo Okinotorishima and Minamitorishima Islands. Retrieved December 22, 2025, from https://www.t-borderislands.metro.tokyo.lg.jp/en/interview/interview3.html

Kawaguchi, S. (2021, October 14). Interview 2: Principal Researcher, Marine Environmental Impact Assessment Research Group, JAMSTEC. The Tokyo Okinotorishima and Minamitorishima Islands. Retrieved December 22, 2025, from https://www.t-borderislands.metro.tokyo.lg.jp/en/interview/interview4.html

Khan, B. Z. (2024). Who Really Owns the South China Sea? The Legal Battle Over Artificial Islands. Journal of Asian Development Studies, 13(4), 1167-1174. https://doi.org/10.62345/jads.2024.13.4.95

Kościelniak, K. (2023). The Artificial Islands of Vietnam in the South China Sea. Reality of Politics: Estimates-Comments-Forecasts, 25(3), 47-62. https://doi.org/10.15804/rop2023303

Lewis, R. (2021). The Artificial Construction and Modification of Maritime Features: Piling Pelion on Ossa. Ocean Development & International Law, 52(3), 239-259. https://doi.org/10.1080/00908320.2021.1917099

Matsuda, T. (2020). Explaining Japan’s Post-Cold War Security Policy Trajectory: Maritime Realism. Australian Journal of International Affairs, 74(6), 687-703. https://doi.org/10.1080/10357718.2020.1782346

Mendenhall, E. (2019). Interpreting the Law of the Sea ‘Regime of Islands’: An Opportunity for Productive US Leadership. Marine Policy, 99, 213-215. https://doi.org/10.1016/j.marpol.2018.10.043

Miao, Y., Cheng, X., Ding, J., Tian, C., & Zhang, Z. (2022). Investigation on Hydrodynamic Performance of a Two-Module Semi-Submersible Offshore Platform. Ships and Offshore Structures, 17(3), 607-618. https://doi.org/10.1080/17445302.2020.1857928

Midford, P., & Østhagen, A. (2024). The East China Sea: A Case of Ocean Geopolitics and Maritime Conflict. East Asia, 41(3), 223-254. https://doi.org/10.1007/s12140-024-09426-y

Miles, M. B., Huberman, A. M., & Saldaña, J. (2014). Qualitative Data Analysis: A Methods Sourcebook (Third Edition). Sage. https://books.google.co.id/books?id=p0wXBAAAQBAJ

Moritaka, H. (2022, September 15). International Legal Regime regarding Islands and Rocks. The OPRI Center of Island Studies. Retrieved December 22, 2025, from https://www.spf.org/islandstudies/research/a00025.html

NISCSS. (2018). A Legal Critique of the Award of the Arbitral Tribunal in the Matter of the South China Sea Arbitration. In S. Lee & H. E. Lee (Eds.), Asian Yearbook of International Law (Vol. 24, pp. 151-293) https://doi.org/10.1163/9789004437784_009

Omori, M. (2011). Degradation and Restoration of Coral Reefs: Experience in Okinawa, Japan. Marine Biology Research, 7(1), 3-12. https://doi.org/10.1080/17451001003642317

Omori, M., Higa, Y., Shinzato, C., Zayasu, Y., Nagata, T., Nakamura, R., Yokokura, A., & Janadou, S. (2016). Development of Active Restoration Methodologies for Coral Reefs Using Asexual Reproduction in Okinawa, Japan. In C. Birkeland et al. (Eds.), Proceedings of the 13th International Coral Reef Symposium (pp. 359-377). International Society for Reef Studies. https://coralreefs.org/publications/icrs-2016-proceedings

Omori, M., & Iwao, K. (2009). A Novel Substrate (the “Coral Peg”) for Deploying Sexually Propagated Corals for Reef Restoration. Galaxea, Journal of Coral Reef Studies, 11(1), 39. https://doi.org/10.3755/galaxea.11.39

Permanent Court of Arbitration. (2016, July 12). The South China Sea Arbitration: The Republic of Philippines (Claimant) v. The People’s Republic of China (Respondent) (Reports of International Arbitral Awards: Volume XXXIII). https://legal.un.org/riaa/vol_33.shtml

Qamar, N., & Rezah, F. S. (2020). Metode Penelitian Hukum: Doktrinal dan Non-Doktrinal. CV. Social Politic Genius (SIGn). https://books.google.co.id/books?id=TAQHEAAAQBAJ

Reguero, B. G., Beck, M. W., Agostini, V. N., Kramer, P., & Hancock, B. (2018). Coral Reefs for Coastal Protection: A New Methodological Approach and Engineering Case Study in Grenada. Journal of Environmental Management, 210, 146-161. https://doi.org/10.1016/j.jenvman.2018.01.024

Sadeghi, K., & Musa, M. K. (2019). Semisubmersible Platforms: Design and Fabrication. Academic Research International, 10(1), 28-38. Retrieved from http://journals.savap.org.pk/vol10n1.html

Sampara, S., & Husen, L. O. (2016). Metode Penelitian Hukum. Kretakupa Print.

Sato, A., Nakamura, R., Kitano, M., Mikami, N., & Tamura, M. (2010). Coral Reef Recovery for Fishery Resources and Habitat Rehabilitation: Experience of Japan. Fish for the People, 8(1), 38-43. Retrieved from https://hdl.handle.net/20.500.12066/804

Savchuk, O. O., Kovtunenko, O. A., & Dashko, D. S. (2024). Нормативне Врегулювання Морського Права: Міжнародний Досвід (Normative Regulation of Maritime Law: International Experience). Legal Scientific Electronic Journal, 2024(11), 265-269. https://doi.org/10.32782/2524-0374/2024-11/60

Song, Y. H. (2009). Okinotorishima: A Rock or an Island? Recent Maritime Boundary Controversy between Japan and Taiwan/China. In S. Y. Hong & J. M. V. Dyke (Eds.), Maritime Boundary Disputes, Settlement Processes, and the Law of the Sea (Vol. 65, pp. 145-175). Martinus Nijhoff Publishers. https://doi.org/10.1163/ej.9789004173439.i-308.56

Tuan, N. K., & Le, V. T. P. (2025). China and Japan’s Strategic Competition in East Asia: The Case of the East China Sea. Edelweiss Applied Science and Technology, 9(3), 964-972. https://doi.org/10.55214/25768484.v9i3.5387

United Nations. (1982, October 7). United Nations Convention on the Law of the Sea (A/CONF.62/122). https://digitallibrary.un.org/record/38990

Watanabe, Y., Yoshida, K., & Nambara, T. (2014). Ocean City Planning in the Waters of Okinotorishima. In Proceedings of the ASME 2014 33rd International Conference on Ocean, Offshore and Arctic Engineering (Vol. 7: Ocean Space Utilization, pp. 1-9). The American Society of Mechanical Engineers. https://doi.org/10.1115/omae2014-24324

Wirth, C. (2023). Solidifying Sovereign Power in Liquid Space: The Making and Breaking of ‘Island Chains’ and ‘Walls’ at Sea. Political Geography, 103, 1-11. https://doi.org/10.1016/j.polgeo.2023.102889

Xue, G. (2011). How Much Can a Rock Get? A Reflection from the Okinotorishima Rocks. China Oceans Law Review, 13(1), 1-34. Retrieved from https://colr.xmu.edu.cn/info/1004/1065.htm

Yee, A. (2011). Maritime Territorial Disputes in East Asia: A Comparative Analysis of the South China Sea and the East China Sea. Journal of Current Chinese Affairs, 40(2), 165-193. https://doi.org/10.1177/186810261104000207

Yoshikawa, Y. (2007). The US-Japan-China Mistrust Spiral and Okinotorishima. Asia-Pacific Journal, 5(10), 1-8. https://doi.org/10.1017/S1557466007022164

Zubaidi, A. K. M., Wiyana, R. I., & Ramadhani, S. N. (2024). The Role of International Law in Safeguarding Indonesia’s Sovereignty: A Case Study of the North Natuna Sea. Journal of Political and Legal Sovereignty, 2(2), 235-247. https://doi.org/10.38142/jpls.v2i2.213

Published
2026-02-06
How to Cite
Widiastuti, T., & Musyarri, F. A. (2026). The Legality of Okinotorishima’s Islandization under UNCLOS: Implications for Indonesia’s Basepoint Preservation Strategies. SIGn Jurnal Hukum, 7(2), 1243-1259. https://doi.org/10.37276/sjh.v7i2.618