The largest South Korean investor in Australia and one of the world’s biggest buyers of LNG has attacked political intervention in the domestic market and questioned whether it can rely on multibillion-dollar deals it has struck with local producers to buy energy.

In a rare public intervention that highlights growing concerns among Asian LNG buyers, Korea Gas Corporation told The Australian Financial Review that proposed measures from both sides of politics to tackle threatened shortfalls over the next few years could threaten gas contracts it has already signed.