Yisrael Mendel Kaplan was born in Baranovich, Congress Poland, Russian Empire (now
Baranavichy, Belarus) to Avraham and Esther Kaplan. Avraham was a lawyer and Esther was involved in community service, raising funds for the
yeshiva and feeding the poor. After his
bar mitzvah, Kaplan was enrolled in
Yeshiva Ohel Torah-Baranovich, and studied under
Elchonon Wasserman. He was considered a very promising student and was assigned Wasserman's son, Naftali, as a study partner. When Wasserman needed to travel overseas in order to raise money for the yeshiva, Kaplan would deliver the lecture in his stead. He later studied in the
Mir yeshiva under
Yeruchom Levovitz. In late 1939, during the
invasion of Poland, the Jews of Baranovich fled for their lives. Wasserman advised his yeshiva students to regroup in then-independent
Vilna, Lithuania. Kaplan, who by this time had gotten married, moved there with his family, where he studied under
Yitzchak Zev Soloveitchik. In June 1940, when the
Soviet Union occupied Vilna, Jewish life became unbearable. Like the members of the Mir yeshiva and other refugees there, Kaplan sought visas to allow him to escape Nazi and Soviet rule. He obtained a
de facto destination visa from the
Dutch consul but was unable to obtain the necessary transit visa from the Japanese Vice-consul,
Chiune Sugihara, that would allow his family to detour through Japan while awaiting some final, true destination. The family nevertheless boarded the trains to the Russian port city of
Vladivostok. His son, Chaim Ozer, was born on the train ride. After entering Japanese territory by boat, Kaplan expected deportation back to Russia and eventually
Siberia. Japanese officials goaded him to produce any kind of visa, and he reluctantly showed them an obviously tampered Japanese transit visa. Inexplicably, it was stamped and accepted and the family continued on to
Kobe and then later to Shanghai. His son Shimon was born in Shanghai, while his middle son, Chaim Ozer got sick and died there. == Career ==