Official campaigning for four lower house by-elections started across Japan on Tuesday, after Prime Minister Fumio Kishida's ruling Liberal Democratic Party won a number of key gubernatorial races over the weekend.With campaigning for a vacant upper house seat in Oita Prefecture already under way, voting for the five by-elections will take place on April 23, the same day as the second round of contests across the country to select mayors and local assembly members.The results of the by-elections could affect Kishida's decision on when to dissolve the lower house for a snap election, pundits…READ FULL ARTICLE