From 7 January 1906, to 14 July 1908, and again from 30 August 1911, to 21 December 1912, Saionji served as Prime Minister of Japan.

Both his ministries were marked by continuing tension between Saionji and the powerful arch-conservative genrō, Field Marshal Yamagata Aritomo.
Saionji and Itō saw political parties as a useful part of the machinery of government; Yamagata looked on political parties and all democratic institutions as quarrelsome, corrupt, and irrational.

Saionji had to struggle with the national budget with many demands and finite resources, Yamagata sought ceaselessly the greatest expansion of the army.
Saionji's first cabinet was brought down in 1908 by conservatives led by Yamagata who were alarmed at the growth of socialism, who felt the government's suppression of socialists (after a parade and riots) had been insufficiently forceful.

The fall of Saionji's second cabinet was a major reverse to constitutional government.
The Taishō Crisis (so named for the newly enthroned emperor) erupted in late November 1912, out of the continuing bitter dispute over the military budget.
The army minister, General Uehara, unable to get the cabinet to agree on the army's demands, resigned.
Saionji sought to replace Uehara.

A Japanese law (intended to give added power to the army and navy) required that the army minister must be a lieutenant general or general on active duty.
All of the eligible generals, on Yamagata's instruction, refused to serve in Saionji's cabinet.
The cabinet was then forced to resign.
The precedent had been established that the army could force the resignation of a cabinet.

Saionji's political philosophy was heavily influenced by his background; he believed the Imperial Court should be guarded and that it should not participate directly in politics: the same strategy employed by noblemen and the Court in Kyoto for hundreds of years.
This was another point in which he was opposed by nationalists in the Army, who wished for the Emperor to participate in Japanese politics directly and thus weaken both parliament and the cabinet.
Nationalists also accused him of being a "globalist".
From 7 January 1906, to 14 July 1908, and again from 30 August 1911, to 21 December 1912, Saionji served as Prime Minister of Japan.
Both his ministries were marked by continuing tension between Saionji and the powerful arch-conservative genrō, Field Marshal Yamagata Aritomo. Saionji and Itō saw political parties as a useful part of the machinery of government; Yamagata looked on political parties and all democratic institutions as quarrelsome, corrupt, and irrational.
Saionji had to struggle with the national budget with many demands and finite resources, Yamagata sought ceaselessly the greatest expansion of the army. Saionji's first cabinet was brought down in 1908 by conservatives led by Yamagata who were alarmed at the growth of socialism, who felt the government's suppression of socialists (after a parade and riots) had been insufficiently forceful.
The fall of Saionji's second cabinet was a major reverse to constitutional government. The Taishō Crisis (so named for the newly enthroned emperor) erupted in late November 1912, out of the continuing bitter dispute over the military budget. The army minister, General Uehara, unable to get the cabinet to agree on the army's demands, resigned. Saionji sought to replace Uehara.
A Japanese law (intended to give added power to the army and navy) required that the army minister must be a lieutenant general or general on active duty. All of the eligible generals, on Yamagata's instruction, refused to serve in Saionji's cabinet. The cabinet was then forced to resign. The precedent had been established that the army could force the resignation of a cabinet.
Saionji's political philosophy was heavily influenced by his background; he believed the Imperial Court should be guarded and that it should not participate directly in politics: the same strategy employed by noblemen and the Court in Kyoto for hundreds of years. This was another point in which he was opposed by nationalists in the Army, who wished for the Emperor to participate in Japanese politics directly and thus weaken both parliament and the cabinet. Nationalists also accused him of being a "globalist".
Saionji Kinmochi