A former top official of a credit union in Japan's Yokohama has been arrested on suspicion of having stolen more than 600 million yen ($4 million) from its safe-deposit boxes, police said Tuesday.The case marks the latest in a string of revelations about employees allegedly stealing cash and other assets from safes rented to customers at banks in Japan, such as one under the wing of Mitsubishi UFJ Financial Group Inc.The police allege Lee Sung Hyon, a former deputy chief of the Yokohama branch of Hana Shinyo Kumiai credit union, stole around 619 million yen in cash from customer safe-deposi…READ FULL ARTICLE