Denka Co. Ltd. (TYO:4061) has revealed its business results for the first quarter of fiscal 2021, marking a recovery from the same period last year. The company ended the quarter with a sales revenue of 86.73 billion yen ($789.69 million), up 13.8 percent year-on-year; operating profit of 7.75 billion yen, up 76 percent; ordinary profit of 7.52 billion yen, up…