The next step is to choose female southern white rhinos among those at Kenya's Ol Pejeta Conservancy to serve as a surrogate mother, Kenya's wildlife minister said.
Japanese newspapers reported that Shigeta's parents were seen kissing a baby when they visited their son in Cambodia, where he also had several children by surrogate mothers.
Females of a closely related species, the southern white rhino, became both the key to developing a rhino embryo in a lab and the leading candidates for surrogate mothers.