TOKYO, Dec 10 - Japanese Finance Minister Sadakazu Tanigaki declined to comment on Wednesday on whether authorities had intervened to weaken then yen earlier in the day. "We don't comment on specific questions like that," he told reporters when asked if Japan had acted to weaken the yen. Tanigaki also declined to reveal details of a discussion he had with Prime Minister Junichiro Koizumi, Bank of Japan Governor Toshihiko Fukui and other policymakers on foreign exchange earlier on Wednesday, though he acknowledged the matter was discussed. The dollar jumped more than one yen in early European trade, and dealers said they suspected yen-selling intervention by Japanese authorities. By 1009 GMT the dollar was trading at around 108.35 yen. It hit a three-year low below 107.00 on Tuesday.//