A 4-year-old boy has died after choking on a large grape during lunch in a Tokyo kindergarten and police have launched a probe into the accident, investigators said Tuesday.The boy suddenly stood up with a pained expression on his face while eating grapes of a variety that measures about 3 centimeters in diameter, provided as part of lunch by the kindergarten in Hachioji, western Tokyo, at around 1:30 p.m. on Monday.Kindergarten staff tried but failed to make him spit out the grape and the boy was taken to a hospital where he was pronounced dead, the investigators said.According to the inve…READ FULL ARTICLE