Since there's no Shogi forum specifically, I think this is the best place to advertise this - in the newest BiggerGolem release, I've changed the file generated by LG from the weird .txt format that only LG understands to an XBoard-compatible .PGN file that you can analyze with `xboard -variant shogi`. It looks just like this:

(Whoops, hit 'Send' to early above, continued here)

Currently I only generate PGNs; I'd love to also support KIF2 or one of the formats that tools like BCM or ShogiGui understand, but I can't find them documented in English anywhere. If someone has any pointers, I'd appreciate hearing about them.