Showa Denko KK (TYO:4004) recently revealed that it achieved an increase to both sales revenue and income for calendar 2018. The company posted sales of 992.14 billion yen ($8.97 billion) for the year, up by 27.1 percent over figures from 2017. Meanwhile, operating income was up 131.6 percent year-on-year to reach just over 180 billion yen, with ordinary income up…