In one of the most memorable exchanges of the Watergate proceedings, an attorney for two of Nixon's closest advisers, John Ehrlichman and Bob Haldeman, referred to Inouye as a "little Jap."
The attorney, John J. Wilson, later apologized. Inouye accepted the apology, noting that the slur came after he had muttered "what a liar" into a microphone that he thought had been turned off following Ehrlichman's testimony.
After the hearings, Inouye said he thought the committee's findings "will have a lasting effect on future presidents and their advisers. It will help reform the campaign practices of the nation."
He achieved celebrity status when he served as chairman of the congressional panel investigating the Iran-Contra affair in 1987. That committee held lengthy hearings into allegations that top Reagan administration officials had facilitated the sale of weapons to Iran, in violation of a congressional arms embargo, in hopes of winning the release of American hostages in Iran and to raise money to help support anti-communist fighters in Nicaragua.
"This was not a happy chore, but it had to be done," Inouye said of the hearings.
The panel sharply criticized Reagan for what it considered laxity in handling his duties as president. "We were fair," Inouye said. "Not because we wanted to be fair but because we had to be fair."
Born Sept. 7, 1924, to immigrant parents in Honolulu, Inouye was 17 and dreaming of becoming a surgeon when Japanese planes flew over his home to bomb Pearl Harbor on Dec. 7, 1941, changing the course of his life.
In 1943, Inouye volunteered for the Army and was assigned to the famed Japanese-American 442nd Regimental Combat Team, which earned the nickname "Go For Broke" and was one of the most decorated units of the war. Inouye rose to the rank of captain and earned the Distinguished Service Cross and Bronze Star. Many of the 22 veterans who received Medals of Honor in 2000 had been in the 442nd.
Unlike the families of many of his comrades in arms, Inouye's wasn't subjected to the trauma and indignity of being sent by the U.S. government during the war to internment camps for Japanese Americans.
"It was the ultimate of patriotism," Inouye said at a 442nd reunion. "These men, who came from behind barbed wire internment camps where the Japanese-Americans were held, to volunteer to fight and give their lives. . . . We knew we were expendable."
Inouye said he didn't feel he had any choice but to go to war.
"I tried to put myself in the shoes of my neighbors who were not Japanese," Inouye once said. "I felt that there was a need for us to demonstrate that we're just as good as anybody else.
"The price was bloody and expensive, but I felt we succeeded," he said.
Inouye's dream of becoming a surgeon ended in the closing days of the war.
On April 21, 1945, he was leading a charge on a machine gun nest in Italy's Po Valley. He was shot in the abdomen, but kept inching toward the machine gun and managed to throw two grenades before his right arm was shattered by a German grenade. Even then, he continued to direct his platoon.
"By his gallant, aggressive tactics and by his indomitable leadership, Second Lieutenant Inouye enabled his platoon to advance through formidable resistance," his Medal of Honor citation said.