Shima Kousaku is a mid level manager (Kachou | Office Chief) at Hatsushiba Electric, a fictional mega corporation based off Mitsubishi Electric and other huge companies. The first series takes place entirely within Japan's economic boom in the early to mid 80s (the first volume came out in '83).

It's got low level office politics, romance, thrilling corporate drama, and occasional mysteries and crime. Though being printed primarily in morning newspapers, it's pretty light reading most of the time.