The article examines historical experience of the state and legal construction, the international status of the two political phenomena, that came to life on the geopolitical space in the first half of the 20th century, — Far Eastern Republic (FER) and Manchzhou-Go, known as non-recognized and puppet states or buffer zones. It uses such criteria of studying non-recognized states as historical prerequisites of establishment and stages of formation, internal structure and formation of statehood institutions, control over its own territory, international recognition. It pays particular attention to international ties with China which became an area of foreign-political interests of the Pacific Region countries.
The article makes a conclusion of existence of common ideas and regularities in arising and development such state formations. The Far Eastern Republic can be regarded as a prototype of Manchzhou-Go, while the «bufferism» as a unique feature inherent to the Far Eastern policy of the XX-th century.