Asahi Kasei Corp. (TYO:3407) has posted its business results for the first half of fiscal 2021, revealing a 19.4 percent year-on-year increase in sales – reaching 1.18 trillion yen ($10.27 billion) – and a 47.4 percent increase in operating income, 113.14 billion yen. Ordinary income too was up, marking a 53.9 percent increase to 119.23 billion yen; as was net…