Campaigning was heating up for Japan's July 10 upper house election on Saturday, with ruling and opposition party leaders pointing to rising prices of daily needs as a major issue.Entering the first weekend after the election's official campaigning kicked off Wednesday, Prime Minister Fumio Kishida and his rivals delivered stump speeches mainly in closely contested voting districts across Japan.Kishida, who heads the Liberal Democratic Party, blamed Russia's invasion of Ukraine for high energy and other prices. "To protect your livelihoods and work, the government will take full responsibil…READ FULL ARTICLE