Interasia

Interasia Lines has a more tangled origin than its name suggests. It was established in Japan in 1967 as Nichinankaiun, under the Japanese bulk operator Navix Line, running liner services between Japan and Southeast Asia, and adopted the Interasia name two years later. Its association with Taiwan's Wan Hai Lines dates to 1992, when Wan Hai acquired a fifty percent stake in the business. When Mitsui O.S.K. Lines absorbed Navix Line in 1999, Interasia was left operating as an MOL-Wan Hai joint venture, an arrangement that lasted until around 2005, when Wan Hai reportedly bought out MOL's remaining shareholding. The company today sits in the orbit of the Chen family, the same family behind Wan Hai, which is why the two carriers appear together so often in service announcements without either being a division of the other.

The relationship is worth stating precisely, because it is regularly described wrongly in both directions. Interasia is not a Wan Hai brand and does not book through Wan Hai's systems; it maintains its own container prefix, its own bills of lading, and its own commercial organisation. Nor is it wholly independent. The two lines co-operate through vessel-sharing and container-interchange agreements, charter tonnage to each other routinely, and jointly launch and restructure services. The Taiwan-Vietnam-Southeast Asia string that began sailing in February 2026 is a straightforward example: a twenty-one-day rotation through Port Klang, Penang, Hong Kong, Kaohsiung, Taipei, Taichung and Ho Chi Minh City, opened jointly by the two carriers, with the first sailing on an Interasia vessel and the following two on Wan Hai hulls. The same pattern recurs across the network, sometimes with additional partners: Interasia has appeared alongside Wan Hai, MOL and PIL on China-India connectivity, alongside Yang Ming and TS Lines on a Pan Asia string, and alongside Sealand on other Southeast Asian loops.

By capacity Interasia remains a mid-sized regional operator, running roughly twenty-two vessels of around 51,000 TEU in total, of which about thirteen are owned rather than chartered, placing it around thirtieth in global operator rankings. Its ships are small by mainline standards, typically in the 1,700 to 3,000 TEU range. That profile is now shifting. Interasia has been ordering steadily: a trio of 3,055 TEU vessels at Nihon Shipyard, and in August 2025 a contract with Yangzijiang Shipbuilding for six 2,900 TEU vessels with options on two more, scheduled for delivery in 2028. More significant is the 7,000 TEU vessel whose steel-cutting ceremony took place at Shanghai Waigaoqiao Shipbuilding in August 2025, with delivery scheduled for June 2026. That ship would be more than twice the size of anything else in the fleet and marks a deliberate move up the size curve rather than a like-for-like replacement. Interasia belongs to none of the three global alliances; its network is built out of bilateral and multilateral service agreements struck trade by trade, which is a more flexible arrangement because partners can differ on every string. The practical consequence for cargo owners is that an Interasia booking usually covers one leg of a longer chain rather than a whole door-to-door move. Maalbardaar tracks and clears Interasia shipments alongside the deep-sea carriers those legs connect to.