Answer: He wanted to expand Buddhism and to unite Japan people
Explanation:
The Prince was supporting the new faith and he wanted Buddhism to expand because he taught that that can help Japanese people to feel more unique and united because of the beliefs that they will share.
Back then, Buddhism was new, and it arrived in Japan from Korea and not everyone was satisfied because of that. The Prince Shotoku wanted to unite Japan and he knew that Buddhism will help when it comes to uniting.
