[struggle]

My wife used to work in Nakaoka when we lived in Arashiyama. It must have cost a lot of money back then as metallurgy and glassworking was just being taught to the Japanese by Korea and China.

[muawiyah]

This is 5th century (400s). By the middle of 6th century much of Japan had been overrun and conquered by Asiatic raiders from what appears to have been Yakutia.

These people are known to have been Turkish speakers and were technologically equal to the Han Chinese.

Remember 535 there was a climate anomaly that destroyed Northern and Western European civilization as well as Northern China's civilization. It was bad enough it shut down the Silk Road until the days of Ghengis Khan ~ who reopened it and has been criticized ever since.

This jewelry gives a look at international trade before that climate anomaly.