How was Hideki a nationalistic?

Answer 1

I presume Hideki is referred to Hideki Tojo, Japanese Prime Minister between October, 1941 and July, 1944. Hideki Tojo was a fervent nationalist: he belonged to the military faction Toseiha (Control Faction), a group opposed to the Kodoha (Imperial Way Faction). The Toseiha (including Tojo) defended a coordinated action between the military, the civilian politicians and the zaibatsu, under the supreme authority of the Emperor. The Kodoha was a revolutionary faction which proposed a so called "Showa Restoration" to build a military and anticapitalist regime (these two factions had only in common nationalist and expansionist ideas).

The Kodoha attempted a coup in February, 1936, and Tojo took part in crushing it. Tojo was known as an efficient bureaucrat and as a deep devotee to the Imperial Institution. He fanatically revered the Emperor. Tojo worshiped Emperor Hirohito and sought to protect him all his life. His last service to his Emperor was to take all the blame for the war in the processes for war crimes. Hirohito heaped praise on Tojo even in his "Monologue" of March, 1946, for serving him loyally.

Two very useful books with information on Tojo and his fanatical devotion to the Emperor are "Hirohito and the Making of Modern Japan", by Herbert P. Bix and "Hirohito and War: Imperial Tradition and Military Decision Making in Prewar Japan", by Peter Wetzler.