The average for shipped cargoes in February was $7.50 per million British thermal units (mmBtu), the lowest since September 2017, METI said on Monday.

Spot prices for LNG <LNG-AS> in Asia have fallen for 11 weeks in a row and are down more than 30 percent since the start of the year, as a milder-than-expected winter and plentiful supplies drove down prices.

The average price of spot LNG cargoes that arrived in Japan last month was $8.30 per mmBtu, the lowest since May last year.

METI surveys spot LNG cargoes bought by Japanese utilities and other importers, but excludes cargo-by-cargo deals linked to benchmarks such as the U.S. natural gas Henry Hub index.

It only publishes a price if there is a minimum of two eligible cargoes reported by buyers.