Iran doesn't believe buyers of its oil — including Japan — will get waivers from Washington following its renewal of sanctions, Oil Minister Bijan Namdar Zanganeh said Friday.

American officials earlier were said to have asked Tokyo to completely halt oil imports from Iran, going beyond the cuts demanded during the 2012 Obama-era sanctions, which removed about 1 million barrels a day from the market. This suggests that U.S. President Donald Trump's restrictions could have a big impact on the market.

The international oil companies Royal Dutch Shell PLC and Total SA have halted purchases already, Zanganeh said.