There’s a common phenomenon where people born and raised in Japan appear younger than their actual age to people who grew up in the West. On a trip to Los Angeles, for example, my wife and I wanted to shoot pool at a local bar, but were turned away at the entrance. She had forgotten to take her passport with her when we went out, and the doorman wouldn’t let us in without proof she wasn’t a minor, despite the fact that we were both in our 30s at the time.
The effect is amplified when the person in question looks young even by domestic Japanese perceptions, such as with actress and TV personality Maiko Ito, whose age we’d never have guessed by looking at her.