Give an analysis of the reasons for the failure of Russia in the war with Japan.

The main reasons for the defeat of our country in the Russo-Japanese War were:

A deep political crisis in the Russian Empire associated with preparations for the revolution.
Economic problems that led to difficulties in the work of industry and, accordingly, insufficient equipment of the army.
The unequivocal superiority of the Japanese fleet over the Russian (this was manifested not only in technical equipment, but also in the approach to command).

As a result of the war, the Russian Empire not only did not acquire new territories, but also lost some of the old ones (for example, part of the Sakhalin Island).