According to that thesis, other immeasurable Buddhas are the Trace Buddha, who is only a copy of the original Buddha Shakuson, so that if you see him as the moon the other Buddha will be 1,000 moons reflected in a rice terrace.
無量の諸仏を迹仏とし、本仏釈尊のコピーに過ぎず、言わば、本仏釈尊を月とすれば諸仏は千枚田に映る千の月であるという論である。