Almost four-fifths of respondents to a government survey said Japan must improve its relations with neighboring China, which have been strained over a spate of disputes, the Foreign Ministry announced Wednesday. The study, which polled 1,314 Japanese voters last month, found that 67 percent of respondents said relations with China weren't good and 77.9 percent said ties needed to be improved. Asked what specific problems were contributing to deteriorating relations with Beijing, nearly 59 percent of respondents raised differences over interpretations of wartime history, including Prime Minister Junichiro Koizumi's visits to a war shrine critics say glorifies Japan's militaristic past....