Regressed

Mamoru Nakayama, a late Japanese Generation X-er (b. 1977), is leading a lazy life heading towards nowhere in 2012 when he suddenly gets time-shifted into the harsh period of Japan's supercharged economic growth a year before Expo 70. Ill-equipped to survive in a culture that places work at the fore, he is forced to make major changes in his 'only me-my-mine' attitude to survive.
An interesting read for adults interested in the Showa culture of the period.