Before alarm clocks (or for those who couldn’t afford them), people in some manufacturing cities in Britain used to be paid to go around town and tap on people’s windows with a bamboo pole. .
Is that a job you’d like to have? Was there a similar job in Japan in the past? Do a little research and see what you can find.
*Just a little warning that in U.S. English, the term “knock up” means something completely different, so just be careful. See this movie for more about that.