By Ruth Chai
April 8 (Reuters) -
Japanese rubber futures fell for the first time in five sessions on Wednesday, as oil plummeted after a ceasefire agreement was reached in the Middle East, with Iran allowing the safe passage of oil and gas through the Strait of Hormuz.
The Osaka Exchange (OSE) rubber contract for September delivery JRUc6, 0#2JRU: was down 1.7 yen, or 0.43%, at 395.7 yen ($2.50) per kg as of 0147 GMT.
The rubber contract on the Shanghai Futures Exchange (SHFE) for May delivery SNRv1 fell 190 yuan, or 1.11%, to 16,905 yuan ($2,465.47) per metric ton.
The most active May butadiene rubber contract on the SHFE SHBRv1 slumped 1,185 yuan, or 6.67%, to 16,590 yuan per metric ton.
Prices of Shanghai butadiene rubber fell below that of natural rubber for the first time in three weeks, since March 24.
U.S. President Donald Trump on Tuesday agreed to a two-week ceasefire with Iran, as the latter agreed to pause its blockade of oil and gas supplies through the Strait of Hormuz.
Iran's foreign minister, Abbas Araqchi, said in a statement that Tehran would stop counter-attacks and provide safe passage through the waterway.
In reaction, oil fell undefined below $100 per barrel on Wednesday, with Brent LCOc1 falling $14.84, or 13.6%, to $94.43 a barrel and WTI CLc1 sliding $16.13, or 14.3%, to $96.82 a barrel as of 0023 GMT. O/R
Natural rubber often follows oil prices as it competes with synthetic rubber, which is made from crude oil.
Japan's Nikkei share average surged more than 4% on Wednesday as lower energy prices eased concerns of an economic slowdown.
The benchmark Nikkei 225 Index .N225 jumped 4.67% to 55,923.27, while the broader Topix .TOPX climbed 3% to 3,763.51.
The front-month rubber contract on Singapore Exchange's SICOM platform for May delivery STFc1 last traded at 205.4 U.S. cents per kg, up 0.2%.
($1 = 6.8567 yuan)
($1 = 158.3900 yen)