I now have a random wire antenna ~16m long (though not straight and the very ends wind around the structure I'm using to hold it up which I'm sure is not ideal), a ~4m counterpoise-ish-thing, a 9:1 balun, and cable to the SDR.

I've gotten wefax (though in negative and spotty, so still some figuring out to do). Still no IBP beacons at all, though.

I have fldigi working to a degree using soundcard as input. No hits using a regex of the beacons' callsigns (including the one here in Japan) on any frequency I've tried. Not sure why that is yet.