On July 13th, 2020, a deceased newborn Longman’s beaked whale was found stranded on a Miyako Island beach in Okinawa Prefecture. This was reported in the scientific journal Marine Biodiversity Records. The Longman’s beaked whale is an extremely rare species of whale with very few cases observed worldwide. Previous research had estimated its maximum body length at around 6 meters, however, the body length of newborns was not known. The newborn Longman’s beaked whale found stranded on Miyako Island was a female, 2.35 meters in length, with fetal folds on the surface of its body. These fetal folds are only seen for the first few weeks after birth, and are formed on the skin due to the calf being curled in its mother’s womb. Due to the presence of visible fetal folds, it is thought the whale was less than a few weeks old. The discovery of the newborn suggests there is a high possibility of Longman’s beaked whales breeding and giving birth in Okinawan waters. This discovery provides extremely important information to better understand the ecology of this species.