China in Poul Anderson's works.
"The Shrine for Lost Children" is set in Japan.
Time Patrol members, Stephen and Helen Tamberly, holiday in archaic Japan. When Stephen is stranded in South America in 2937 BC, he becomes the Vesselmaker and produces the Valdivia ware so that he will be found by a time traveler investigating this mysteriously Japanese-like pottery.
food but cannot think of any.
Addendum: I did not forget Trygve Yamamura for long and expected to find a comment about him when I switched the computer back on. The blog is always a work in progress.