What was japan’s era of revolution called

It is called the Meiji Restoration. The period started from the Meiji Restoration — the return of all the fullness of state power to the emperor after centuries-old shogunate domination — brought the country out of feudal backwardness into a group of the world's most powerful imperialist powers.

the right answer for the question that is being asked and shown above is that: "their policy of "divide and rule" pitted political groups against each other to keep any one group from becoming too powerful.  " the  participant in european imperialism is being described below is that  their policy of "divide and rule" pitted political groups against each other to keep any one group from becoming too powerful.