Alternative fuels comprised 12% of NYK’s marine fuel mix in 2025

In 2025, Japanese shipping company NYK Line reported that low greenhouse gas (GHG) emissions marine fuels made up 12.2% of their total fuel consumption. The company expanded its dual-fuel fleet, operating 35 such vessels in 2025, up from 26 in 2024. Biofuels were the largest share of NYK Line's marine fuel mix during this period, followed by LNG.

Biofuel consumption rose to 297,000 metric tons in FY2025, continuing an upward trend from 251,000 mt in the previous year and a baseline of 6,000 mt in FY2023. The company actively seeks to increase biofuel and alternative fuel usage to achieve immediate GHG emissions reductions. By adopting low-emission marine fuels, NYK Line managed to reduce its emissions by 260,000 metric tons of CO2 equivalent (CO2e) in FY2025.

Furthermore, the company's biofuel usage resulted in an estimated 200,000 mt CO2e reduction compared to energy-equivalent heavy fuel oil like HSFO. This significant emission decrease was confirmed through ISCC certification. NYK Line plans to launch a 12-month B100 (100% biofuel) pilot project aboard a car carrier in May 2026, using biofuel derived from used cooking oil.

The trial aims to assess engine durability and develop safe operational guidelines for continuous B100 use. Additionally, the company is evaluating Cashew Nut Shell Liquid (CNSL) as part of its efforts to broaden the range of sustainable biofuel options. NYK Line's net-zero by 2050 roadmap involves a two-pronged approach, focusing on expanding low-emission marine fuel usage while maximizing vessel design and operational efficiencies.