Benchmark Tokyo rubber futures rose for a fourth straight session on Friday, supported by firm oil prices, brokers said. The Tokyo Commodity Exchange rubber contract for October delivery finished 0.7 yen higher at 214.5 yen ($1.89) per kg. Crude rubber inventories at Japanese ports stood at 3,864 tonnes as of April 30, down 1.5 percent from the last inventory date, data from the Rubber Trade Association of Japan showed on Friday. Rubber inventories in warehouses monitored by the Shanghai Futures Exchange rose 0.6 percent.

The most-active rubber contract on the Shanghai Futures Exchange for September delivery rose 25 yuan to finish at 13,540 yuan ($1,961) per tonne. The front-month rubber contract on Singapore's SICOM exchange for June delivery last traded at 148.50 US cents per kg, down 1.5 cents.

Copyright Reuters, 2017