Around one-quarter of Ocean Network Express (ONE)’s tonnage will be from a single provider over the next year.

But ONE chief executive Jeremy Nixon said the Japanese line’s investment with the world’s largest boxship tonnage provider will not destabilise Seaspan Corp’s relationship with other charterers.

The Singapore-based carrier is set to double the number of container ships it has on charter from Seaspan to around 40 ships over the next 12 months, Nixon said in a business update on Friday.