MadHatter at the BS Zelda forums linked me this the other day;
A profile for “St.GIGA” at last.fm
I don’t really know how this site works, but I have checked out the various listings. In particular, the “tracks” listing has an entry for “BS Tantei Club ending theme”. Hmm…!
If this is the same St.GIGA from the old times, I wonder if this would mean well for the archival of Satellaview data…