Japan

Japan receives less coverage than 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.

Anything else?

I would love to include a reference to Japanese 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.

Kamakura

Both Rudyard Kipling (here) and Poul Anderson (here) refer to Buddhism in Kamakura. However, Anderson's short story describes a visit to Japan whereas Kipling's novel is set in India.

Recent posts have discussed ancient mythology, scientific cosmology and a Kipling connection: essential Poul Anderson.

In his Japan-based story, Anderson also mentions:

the Temple of the Golden Pavilion;
Sumiyosi Taisha;
the Sengakuji;

the Forty-Seven Ronin;
Daibutsu;
the Hase district;
the Kannon Hall;
Sagami Bay;
Jizo;
Amida.

"The Shrine for Lost Children" was more coherent on rereading and contains a wealth of Japanese references. See links above.