Tennis superstar Naomi Osaka showed off a new fashion accessory while hanging around her home country of Japan this week ... posting a few pics of her growing baby bump!!
25-year-old Osaka -- who announced back in January she was expecting her first child -- was smiling from ear-to-ear in her Instagram post on Tuesday ... which is a rare public appearance for the athlete as she prepares for the baby.
In fact, Osaka recently poked fun at herself for being an introvert throughout the pregnancy .