I assume you are referring to World War 2?

Japan had a small Jewish community at the outbreak of the war. They were better off than those who were in Europe. Japan didn't have any interest in adopting Nazi ideology about the Jews, and anti-antisemitism remains pretty rare in today's Japan.

In 1940, Japan's foreign minister said: "I am the man responsible for the alliance with Hitler, but nowhere have I promised that we would carry out his anti-Semitic policies in Japan. This is not simply my personal opinion, it is the opinion of Japan, and I have no compunction about announcing it to the world.”

There is also the famous example of, Chiune Sugihara , Japanese consul in Lithuania who issued thousands of transit visas to thousands of Polish Jews in 1940, allowing them to reach Asia and avoid the Holocaust.