Chotaro Kosumi was 12 years old when Krakatoa begins to erupt; the volcano explodes three months later, killing more than 36,000 people. Krakatoa, or Krakatau, is a volcanic island situated in the Sunda Strait between the islands of Java and Sumatra in the Indonesian province of Lampung. The name is also used for the surrounding island group comprising the remnants of a much larger island of three volcanic peaks which was obliterated in a cataclysmic 1883 eruption.
Chotaro Kosumi was 21 years old when Thomas Edison patents the motion picture camera. Thomas Alva Edison was an American inventor and businessman, who has been described as America's greatest inventor. He developed many devices that greatly influenced life around the world, including the phonograph, the motion picture camera, and the long-lasting, practical electric light bulb. Dubbed "The Wizard of Menlo Park", he was one of the first inventors to apply the principles of mass production and large-scale teamwork to the process of invention, and is often credited with the creation of the first industrial research laboratory.
Chotaro Kosumi was 35 years old when Albert Einstein publishes his first paper on the special theory of relativity. Albert Einstein was a German-born theoretical physicist who developed the theory of relativity, one of the two pillars of modern physics. His work is also known for its influence on the philosophy of science. He is best known to the general public for his mass–energy equivalence formula E = mc2, which has been dubbed "the world's most famous equation". He received the 1921 Nobel Prize in Physics "for his services to theoretical physics, and especially for his discovery of the law of the photoelectric effect", a pivotal step in the development of quantum theory.
Chotaro Kosumi was 46 years old when Tsar Nicholas II of Russia was forced to abdicate in the February Revolution, ending three centuries of Romanov rule. Nicholas II or Nikolai II, known as Saint Nicholas in the Russian Orthodox Church, was the last Emperor of Russia, ruling from 1 November 1894 until his forced abdication on 15 March 1917. His reign saw the fall of the Russian Empire from one of the foremost great powers of the world to economic and military collapse. He was given the nickname Nicholas the Bloody or Vile Nicholas by his political adversaries due to the Khodynka Tragedy, anti-Semitic pogroms, Bloody Sunday, the violent suppression of the 1905 Russian Revolution, the executions of political opponents, and his perceived responsibility for the Russo-Japanese War (1904-1905). Soviet historians portray Nicholas as a weak and incompetent leader whose decisions led to military defeats and the deaths of millions of his subjects.
Chotaro Kosumi was 50 years old when The Nineteenth Amendment to the United States Constitution was ratified, guaranteeing women's suffrage in America. The Nineteenth Amendment to the United States Constitution prohibits the states and the federal government from denying the right to vote to citizens of the United States on the basis of sex. It was adopted on August 18, 1920.
Chotaro Kosumi was 69 years old when World War II: Nazi Germany and Slovakia invade Poland, beginning the European phase of World War II. World War II, also known as the Second World War, was a global war that lasted from 1939 to 1945, although conflicts reflecting the ideological clash between what would become the Allied and Axis blocs began earlier. The vast majority of the world's countries—including all of the great powers—eventually formed two opposing military alliances: the Allies and the Axis. It was the most global war in history; it directly involved more than 100 million people from over 30 countries. In a state of total war, the major participants threw their entire economic, industrial, and scientific capabilities behind the war effort, blurring the distinction between civilian and military resources. World War II was the deadliest conflict in human history, marked by 50 to 85 million fatalities, most of whom were civilians in the Soviet Union and China. It included massacres, the genocide of the Holocaust, strategic bombing, premeditated death from starvation and disease and the only use of nuclear weapons in war.
Chotaro Kosumi died on 1 Apr 1942 at the age of 71