The NHK article you linked is about a death by shooting in Machida, and unrelated to this earthquake. There is an article about the earthquake from about four hours before that one was posted (https://www3.nhk.or.jp/shutoken-news/20230526/1000093005.htm...), though, and it doesn't mention deaths. That one was posted specifically in the section for Tokyo metro area (首都圏) news rather than national news, which does lend credence to the notion that fatality-less earthquakes don't garner much of a news cycle.