Prime Minister Shigeru Ishiba on Tuesday called on his fellow ruling party lawmakers to unite toward a key election this summer as the Liberal Democratic Party aims to retain majority control of the House of Councillors with its coalition partner.The upcoming upper house election will be critical for Ishiba, who heads the LDP, after the ruling coalition lost its majority in the more powerful House of Representatives in a general election last year."I want our party to gather all-out efforts and make Japan a better place," Ishiba said at the LDP headquarters as party lawmakers returned to wo…READ FULL ARTICLE