Japanese off board Artillery Guadalcanal, the war

[warstudent]

I remember years ago reading that US arty in WW2 was more plentiful and available than what the Germans had. It's only in the last couple of years I've been interested in studying the Pacific in WW2 and I've only recently discovered how badly the Japanese were prepared for land war.

I didn't really notice until recently that the Japanese in Guadalcanal basically have no off board artillery vs USA. Was that typical for the other battles in the Pacific campaign?

Compared to the other countries were the Japanese really inferior with artillery? I'm assuming in China the Japanese were greatly outnumbered because of population. Did the Japanese use extra arty in China?