What was the immediate cause of Professor Ueno's death?
Answer
A fatal cerebral hemorrhage
Professor Ueno suffered a fatal cerebral hemorrhage while he was giving a lecture, which caused his routine journey home to be permanently halted.

Related Questions
What was the immediate cause of Professor Ueno's death?Who initially took custody of Hachiko after Professor Ueno's passing?Where was Hachiko relocated when he first stayed with Kobayashi?How long did Hachiko remain under the care of Kikuzaburo Kobayashi?What model described Hachiko's sustenance after he returned to Shibuya Station?Which groups were primarily responsible for feeding Hachiko at the station?When did Hachiko pass away, concluding his long vigil?What significant contrast existed between Ueno's care and the community's care?What serious internal ailments did Hachiko develop in his final years?What crucial element of care was largely absent during Hachiko's later years at the station?