South Korean president Lee Jae‑myung began a two‑day state visit to the Philippines on March 3, signing a suite of memoranda that broaden cooperation in defence, artificial intelligence and critical minerals. The accords include revisions to a government‑to‑government defence procurement framework and ten memoranda of understanding intended to deepen industrial and strategic links between Seoul and Manila. Despite the emphasis on security cooperation, Lee conspicuously avoided public remarks on the South China Sea, even as Philippine president Ferdinand Marcos Jr. raised the issue in a joint appearance.
The defence elements of the visit are concrete rather than rhetorical: Seoul and Manila agreed to widen the range of companies that can participate in government‑to‑government defence contracts, and to extend cooperation into weapons sustainment, maintenance and logistical support. That shift would move ties beyond single‑sale exports to long‑term support arrangements, creating a more integrated bilateral defence relationship. Lee also presented a gilded model of a turtle ship — a symbolic nod to South Korea’s shipbuilding prowess and an explicit message about the role of Korean defence industries in future projects.
Philippine plans provide immediate commercial prospects for Korean firms. Manila’s so‑called “Horizon 3” modernisation programme, with an estimated price tag in the trillions of pesos and a naval build‑up at its core, explicitly envisages new surface combatants and submarines as it seeks to close capability gaps. South Korean companies such as HD Hyundai — whose HD‑built Jose Rizal frigate was delivered in 2020 and has since participated in multinational exercises — and conglomerates represented in the presidential trade delegation, are already positioned to compete for contracts.
The silence on the South China Sea from Seoul is telling. Marcos used a joint press appearance to invoke the need to uphold international law and maritime order, but Lee’s public comments steered clear of any mention of the disputed waters. That reticence reflects a familiar diplomatic balancing act: South Korea is keen to expand defence exports and strengthen ties with Southeast Asian partners while avoiding direct confrontation with Beijing, its largest trading partner and a neighbour sensitive to security‑sector engagement in the region.
For Manila, deeper ties with Seoul provide practical options beyond traditional suppliers. The Philippines has long relied on US security guarantees and purchases but is diversifying sources of hardware, sustainment and industrial partnerships. For Seoul, the visits and MOUs are part commercial push — to grow a defence industry that has matured technologically — and part strategic outreach, helping Korea embed itself in regional supply chains and security architectures without overtly aligning on territorial disputes.
Looking ahead, the real test will be implementation: which projects proceed under the new procurement arrangements, whether submarine or sustainment contracts materialise, and how China reacts if Korean firms win high‑visibility naval work. A cautious diplomatic posture today could give Seoul strategic flexibility tomorrow, but it will also require managing expectations in Manila, where calls for a clearer stance on maritime disputes remain politically salient.