Matsukata Masayoshi
Saionji was appointed a "genrō" in 1913. The role of the "genrō" at this time was diminishing; their main function was to choose the prime ministers – formally, to nominate candidates for Prime Minister to the Emperor for approval, but no Emperor ever rejected their advice. From the death of Matsukata Masayoshi in 1924, Saionji was the sole surviving "genrō". He exercised his prerogative of naming the prime ministers very nearly until his death in 1940 at the age of 91. Saionji, when he could, chose as prime minister the president of the majority party in the Diet, but his power was always constrained by the necessity of at least the tacit consent of the army and navy. He could choose political leaders only when they might be strong enough to form an effective government. He nominated military men and non-party politicians when he felt necessary.