Japan will press for regulating speculative money in oil futures when energy ministers from the Group of Eight major nations gather in Rome for a two-day meeting Sunday, government officials said.

The Rome energy conference is set to discuss issues ranging from stability in oil markets to cooperation in promoting energy-efficient technologies, but Japan's focus is on ensuring price stability in oil futures.

Tokyo's proposal is expected to face opposition from countries that want to avoid excessive control of the markets, the officials said.