Nikkei jumps to 7-month high on renewed "Abenomics" hopes

* Brokerage shares best performers due to pension reform hopes * Exporters gain as yen falls near 5-year low * Fuji Heavy hits record high By Hideyuki Sano TOKYO, Sept 3 (Reuters) - Japanese shares hit a seven-month high on Wednesday, with brokerages leading the gains because of hopes that a cabinet reshuffle by Prime Minister Shinzo Abe will give fresh impetus to his growth-oriented policies. Exporters' shares also rode high as the yen weakened to an eight-month low and as