Speaking of Gazette, forgot that their seniors (LUNA SEA) had their own “tuning clashes” as well:
Their LUNACY (2000) album had its own weird moments (including FEEL as mentioned in another thread), but 4:00AM was quite something:
Sugizo - slide guitar (standard, EADGBE), main guitar (D standard, DGCFAD)
Inoran - standard tuning (EADGBE)
J - standard bass tuned half step down
A complete clusterheck, yet somehow it works?
Also, another goldmine for this thread to add: their B-sides
Inoran - open D tuning (DADF#AD)
Sugizo - Standard tuning (EADGBE)
J - drop D bass (DADG)
There are other examples to name (Into the Sun, Be Awake, Be Gone, etc.), but this band never disappoints.
EDIT: @Ro_pls
I haven’t looked into your Gazette pick, but AFAIK, Nakigahara must have been one roadie/guitar tech nightmare (besides SHADOW VI II I - C# G C F, really?):
Reita - C# standard bass (C#F#BE)
Uruha - Drop C (CGCFAD)
Aoi - D standard (DGCFAD)
I think this is one of those few times where Reita deviated from his usual “Gazette tunings”.