The chaos forced the train to make an emergency stop at Odawara Station in Kanagawa Prefecture, where police stormed the carriage and subdued the suspect.
The police detained the 22-year-old male stabber on suspicion of attempted murder and are now investigating the case.
The seriously-wounded man was later confirmed dead and the situation of the two other injured was not revealed. The assault occurred while the train, which was bound for Shin-Osaka Station in Osaka, was traveling on the section between Shin-Yokohama and Odawara stations, both in Kanagawa Prefecture.
Umeda's family issued a statement through a lawyer, saying, "We do not have words to express the sorrow of suddenly losing a loved one".
The suspect told investigators that he felt "frustrated and wanted to kill someone", public broadcaster NHK said, adding that he used at least two knives.
Kylie Jenner Deletes All Photos Of Stormi's Face From Instagram
Fair enough, but any eagle-eyed fans will also notice that Ky went back and got rid of all photos featuring Stormi's adorbs face. The makeup mogul shared a new selfie showing off her freckles while Stormi's face remained hidden from view.
Witnesses spoke of 20 to 30 passengers panicking and fleeing from the direction of the No. 12 vehicle.
"Witnesses said passengers were crying as they ran to other coaches, shouting "Just keep going ahead" and "(the suspect) has a knife".
After he started living with his grandmother, she said he mainly stayed home, reading books and surfing the internet.
In 2015, a man set himself ablaze on board a moving bullet train, killing himself and a woman in an unprecedented incident.
Operators often boast of the safety of bullet trains, with no fatalities having occurred due to derailments or malfunctions in their over 50 years of service since 1964.
The attack took place in vehicle No. 12 of the 16-car train while it was between Shin-Yokohama and Odawara stations, both in Kanagawa. The train was carrying more than 800 passengers at the time of the incident.