If you're talking about the Hakkero itself, it is. It has the trigrams on it too.
ye i noticed when i was trying it out
i gotta say tho the weapon was rather underwhelming
it really needs some kind of charge up effect for the master spark rather than just being immediate as that looks really silly
although i guess it is massively more complicated to do
also the projectile is incredibly slow, and the blast itself seems to push enemies away which kind of makes them never get hit