So when did Japanese people become so time conscious? It seems there are various theories, but none precisely pins down the real reason. According to one theory, traditionally, Japanese people were generous with time. At the start of the Meiji era, a half-hour delay on the trains was very common and many factory workers were often late for their shifts. As a result, at the start of the Showa era, approximately 80 years ago, the Scientific Management System was introduced. First created in the US, this system of managing workers was used to boost productivity in factories by standardizing elements such as time keeping.