Though Lord Hardinge escaped death, Rash Behari's efforts continued unabated. Actually, it was a larger area of operation, a sort of an all India revolution concentrating mainly on various cantonments.
Rash Behari Bose left Calcutta on May 12, 1915. He went to Japan as Raja P.N.T. Tagore, a distant relative of Rabindranath Tagore. Some historians say that Rabindranath Tagore was aware of this impersonation.
Between 1915 and 1918, Rash Behari lived almost like a fugitive, changing his residence 17 times.
During this period he met Herambalal Gupta and Bhagwan Singh of the Ghadar Party.