Bando Chemical’s first half (April-September) results (IFRS) showed revenue of 52.2 billion yen ($378.70 million), up 13.1 percent year-on-year; and core operating profit of 3.65 billion yen, down 16.6 percent. Sales of products remained strong despite the lingering impact of the coronavirus pandemic. Sales also increased due to the weaker yen. On the other hand, the cost of sales ratio…