Agence France-Presse: China and Japan pledged on Friday to build on their rapidly warming ties, as Japanese Prime Minister Yasuo Fukuda met the Chinese leadership, but a dispute over maritime gas fields remained unresolved. Fukuda, on his first visit to China since taking office in September, held talks with President Hu Jintao to lay the groundwork for closer cooperation between the Asian powers in trade, climate change and other fields. "Since taking office, you have emphasised the importance …