TOKYO, June 15 (Reuters) - Japanese shipping companies on Monday welcomed the U.S.-Iran peace deal that will reopen the Strait of Hormuz, but said they were waiting for more details on the agreement and mine clearance before allowing their vessels to pass through the vital waterway.

The Japan Shipowners Association reported that 38 Japan-linked vessels remain stranded in the Strait of Hormuz.

The US-Israeli war on Iran, which began on February 28, brought most shipping traffic through the strait to a standstill. About one-fifth of the world’s oil and liquefied natural gas supplies, along with products such as aluminum and urea, pass through this strait.

Global oil prices fell 4 percent on Monday after U.S. President Donald Trump and Iran's deputy foreign minister said the two countries had reached a preliminary agreement to end the war and resume traffic through the Strait of Hormuz.

A spokesman for the Japan Shipowners Association said on Monday that while the group welcomed the peace agreement, it wanted to "wait a little longer for more detailed information," which is expected to be released on Friday in Switzerland, where the US-Iran agreement is scheduled to be signed.

The spokesman said that news reports indicated mines had been planted in the area, adding, "Under these circumstances, we cannot simply say 'Okay, let's go,' based solely on the news of the agreement."