Asahi Kasei Corp. (TYO:3407) has reported its business results for fiscal 2020, showing a year-on-year decline to both sales and income metrics. The company posted sales revenue of 2.11 trillion yen ($19.33 billion), down 2.1 percent year-on-year; operating income of 171.81 billion yen, down 3.1 percent; ordinary income of 178.04 billion yen, down 3.2 percent; and net income of 79.77…