Benchmark Tokyo rubber futures extended gains into a third day on Wednesday to hit a 1-week high, backed by firmer Japanese equities and a brightening economic outlook for China, the world's biggest rubber buyer. The Tokyo Commodity Exchange (TOCOM) rubber contract for March delivery finished 2.7 yen, or 1.3 percent, higher at 208.5 yen ($1.85) per kg. It touched the highest since Sept. 28 of 209.7 yen earlier in the session.