Xuanzang is known as "Genjō" (玄奘) in Japanese, and Yamato monks that trained with him, like Dōshō (道昭), Chitatsu, and Chiitsu, would bring back the teachings of his "Faxiang" school, known as "Hossō" (法相) in Japan.

Sakafune-ishi may be one of the stones most closely connected with Saimei, though it is hard to say for sure. The placement matches some of the work in the Nihon Shoki, though. Was this the result of the "mad canal" that upset so many people at the time?
(Public domain image from Wikimedia Commons)

The stone work that they've found includes things like this model of Mt. Sumera that is also a fountain. These weren't just images, these were feats of engineering using natural water pressure. These would have adorned gardens in mansions and temples.

This was the "Asuka Capital", with multiple palace sites built one on top of each other through the latter 6th and 7th centuries, nestled between the hills and surrounded by newly constructed temple complexes. (Image shows a model of Asuka from its height, towards the end of the 7th century).