TOKYO, Nov 21(Reuters) - Japanese stocks edged up on Friday after Prime Minister Shinzo Abe dissolved parliament's lower house in preparation for an election in which he will seek a fresh mandate for his struggling economic revival strategy. The Nikkei average recouped early losses to end 0.3 percent higher at 17,357.51 points. For the week, it fell 0.8 percent, the first weekly drop in five weeks. The broader Topix gained 0.2 percent to 1,400.18, while the JPX-Nikkei Index 400 rose 0.1 percent to 12,778.23. (Reporting by Ayai Tomisawa; Editing by Kim Coghill)