Why woud they give a f?
Why would SoftBank Japan give a flying f*** if their network meets some protectionist US standard or not? To be clear, the network in question is in Japan, and Softbank does not have any network in the US (i.e. no US presence for nutjob Trump to use as leverage.) I'm just honestly wondering what the point is of letting the state dept. sniff around your in-no-way-US-based network to begin with.