What about?
As she promised, our friend Takara and her family were waiting for us at the Osaka airport on Monday, June 16.
The underlined portion functions as the subject. In other words,
EX: They were waiting for us at the Osaka airport.
Please note, separate the day form the date: Monday, June 16.![]()
As she promise our friend Takara, and her family were waiting for us at the Osaka airport on Monday June 16.