A Sasanian blue glass cup with a silver base, given as a gift to the Empress Kōmyō (701-760 CE). Now housed at the Shoso-in Repository in Nara, Japan [2186×2893]

This is an interesting artefact given the title states that a Sassanian Cup from modern-day Iran made its way to Japan in the 700s AD. Looking this up this artefact likely made its way from the Sassanian Empire to China, and from there was brought to Japan by Buddhist monks and other envoys making their way from China to Japan:

*”It was constructed at the command of Emperor Shōmu (r. 724-49), and after his death his belongings and household items were presented to this imperial repository by his widow, the empress* ***Kōmyō****.* ***The most interesting of the artifacts stored there since the 8th century include exotic objects brought back from China by Japanese monks, dignitaries, and envoys.*** *Some of these artifacts traveled to China, Korea, and Japan from Persia, Central Asia, and India along the Silk Routes, the system of trade routes linking East Asia with the western world.”*

[https://www.iranicaonline.org/articles/japan-xi-collections-of-persian-art-in-japan](https://www.iranicaonline.org/articles/japan-xi-collections-of-persian-art-in-japan)