The commitment came during Takaichi’s visit to Hanoi, where the two leaders discussed expanding the Comprehensive Strategic Partnership established in 2023, covering sectors including energy, critical minerals, artificial intelligence, semiconductors and space cooperation.

“The two sides identified economic security as a new priority area for bilateral cooperation,” Takaichi told reporters after the meeting.“With regard to critical minerals, both sides agreed to strengthen close coordination to ensure stable supplies and reinforce supply chains,” she said.

The talks come as Japanese investment flows into Vietnam weakened sharply despite stronger trade ties. New Japanese investment in Vietnam fell about 75% year-on-year to $233 million in the first quarter of 2026, while bilateral trade rose 12.3% to $13.7 billion during the same period, according to Vietnamese government and customs data.

Japan remains one of Vietnam’s largest foreign investors, with major Japanese manufacturers operating extensive production bases in the country across electronics, automotive and industrial sectors.As part of the visit, both governments signed six agreements covering infrastructure development, climate action, agriculture, digital transformation, technology cooperation and space development, reinforcing broader strategic cooperation beyond trade.

Vietnam has also been seeking support from Japan and other partners to stabilize oil supplies as conflict in the Middle East pushes up crude prices and disrupts shipping routes.Under Japan’s $10 billion Power Asia Initiative, designed to strengthen energy self-reliance across Asia, Tokyo will help arrange crude oil supplies for Vietnam’s Nghi Son Refinery and Petrochemical Complex, one of the country’s most important energy facilities, Prime Minister Hung said.

Takaichi is also scheduled to meet To Lam and senior Communist Party leadership later on Saturday and deliver a keynote address at Vietnam National University.Her speech is expected to mark a decade since former Prime Minister Shinzo Abe introduced Japan’s “Free and Open Indo-Pacific” strategy, a regional framework aimed at strengthening rules-based order, maritime security and economic cooperation across Asia.

Vietnam has publicly supported Japan’s regional initiatives, including the Free and Open Indo-Pacific Vision, aligning them with ASEAN’s broader Indo-Pacific outlook and emphasizing international law, regional stability and balanced strategic autonomy.Hung said Vietnam viewed the framework as contributing positively to “peace, stability, cooperation and development in the region and beyond.”

The visit reflects Tokyo’s broader effort to deepen strategic partnerships across Southeast Asia as competition over technology, trade routes, mineral access and energy security intensifies across the Indo-Pacific.