In FY 2015, Mitsuboshi Belting Ltd. (TYO:5192) posted operating income of 7.6 billion yen ($69.45 million), a 7 percent increase over the year prior and the highest the company has ever achieved. Year-on-year net sales were up no more than 1 percent at approximately 67.1 billion yen. Net sales of belts in Japan were around 26.5 billion yen, down 3…