His nephew, Professor Taru Ifukube, inspired by his uncle, is the composer of the official NHK (state broadcaster) earthquake alarm sound, created to be audible to a wide range of hearing, even in noisy situations and across long distances. The tune is also deliberately so unpleasant and nasty sounding that no human would play it deliberately or as part of other music. You can hear it orchestrated as an experiment here.
https://hell.twtr.plus/media/f719140a6c1d6fbce1151b0f2a4b0c4769ef5cc2137b889fec7b5f4e5b03dcab.file
https://hell.twtr.plus/media/86dbf7f42d4a14b179da0a162abbe15911b0ee84df634dbc23cadbc53e6ea3fc.file