Japanese anti-treaty postcard
Source: Asia-Pacific Journal
Infamous "Hibiya Riots" - Responding to the treaty, Japanese citizens rioted in Hibiya Park.
Source: Asia-Pacific Journal
There was widespread negative reception in Japan to the treaty terms. Many Japanese believed that their sacrifices were not sufficiently compensated, resulting in riots erupting throughout the country, i.e. Hibiya Riots.
Japan officially annexed Korea, overthrew the emperor, and installed a puppet government to rule Korea until the end of WWII.
Excerpt of article covering Roosevelt's mediation during the negotiations.
Source: Chronicling America
The Moscow uprising of 1905 caused by the Tsar's mismanagement in the Russo-Japanese War.
Source: Imperial War Museum
Even with an attitude of benevolent neutrality towards Japan, the American public opinion towards Japanese victories was one of great excitement. Most Americans believed that Japanese plans in Manchuria would suppress Russian expansionism.
The Russians reacted negatively to the Treaty, blaming the Tsar for a pointless war and for neglecting domestic issues. The heavy casualties and concessions from the treaty led to the Russians launching two revolts in 1905 and 1917, eventually overthrowing the Romanov Dynasty and establishing the Russian Communist Party.
Source: Newspaper reporting on the Portsmouth Peace Treaty