Once Emperor Fushimi ascended to the throne Tamekane also became active as a politician, but was banished to Sado Province in 1298 for his participation in the attempt, as an aristocratic supporter of the Jimyoin lineage, to manipulate the Imperial succession in favor of the Jimyoin line.
伏見天皇が践践した後は政治家としても活躍したが、持明院統側公家として皇統の迭立に関与したことから、1298年（永仁6年）佐渡国に配流となった。