Abstract: Before the Russo-Japanese War,the leader of Black Dragon Society, Uchida Ryohei put forward war instigation.it demonstrated strongly that the governmental diplomatic polices were affected by mainland Ronin. Uchida Ryohei' war instigation could be divided into four stages.In the first stage (1897-1901),Uchida Ryohei sneaked into Russia four times,with the sense of crisis on the Russia's invasion and the insight into Russia's domestic conflicts,Uchida Ryohei advocated strongly to declare the war,which opened the prelude of the Japanese continental Ronin's instigation.In the second stage (1902),in consideration of the international situation,Uchida Ryohei and his Black Dragon Society took both appeasement policy and war preparation to Russia.In the third stage (1903-1904),because of Russia's failure in keeping its promise of withdrawal from northeast China, Uchida Ryohei got tough with Russia once again and recommended his war plan to the military headquarters,but failed.Then,he began to instigate the public opinion for the war on one hand,and on the other hand,he cooperated with the government,relaxed and guided the public opinions during the period of negotiation of Russo-Japanese War.In the fourth stage (1905),the Portsmouth Peace Talks were held,and Uchida started to split up with other hard liners toward Russia and tended to assistant government's Peace Policy.

Key words: Russo-Japanese War, Portsmouth Peace Talks, Uchida Ryohei, instigation