Career
He was known for his failed assassination attempt on controversial Japanese Prime Minister Hideki Tojo. He came from a family of Nagano Prefecture. He served in China under Prince Mikasa.
As the war progressed, Tsunoda sought for the resignation of Prime Minister Tojo.
He plotted to assassinate Tojo, but Tojo resigned before the assassination could be executed. Tsunoda was arrested for his role in the plot.
He admitted that he planned to kill Tojo, and launch a new cabinet under Prince Higashikuni.