He became Chief of the Imperial Japanese Army General Staff on December 1 , 1931 , replacing General Kanaya Hanzo .
In 1921 , Prince Kan'in accompanied then - Crown Prince Hirohito on his tour of Europe .
Prince Kan'in became Chief of the Imperial Japanese Army General Staff on December 1 , 1931 , replacing General Kanaya Hanzo .
In 1921 , Prince Kan'in accompanied then - Crown Prince Hirohito on his tour of Europe .