Japan's biggest banks are racing to adapt to changing business conditions amid a shrinking population and the spread of online banking.Many have laid out plans to downsize their workforce and massive network of branches while investing in "fintech" -- technological innovation in the financial sector -- to streamline their operations and make banking more convenient for their customers.Mitsubishi UFJ Financial Group Inc. is the country's largest financial group by assets, and the red-logoed branches of its core banking unit are a common sight in central Tokyo.Despite such ubiquity, the Bank …READ FULL ARTICLE