Claudio Ranieri was furious at his Leicester City players after watching their first-half performance against Newcastle United.
The Premier League leaders won 1-0 on Monday night to go five points clear at the top of the division.
The game, Rafa Benitez's first as relegation-threatened Newcastle's manager, was decided by a 25th-minute overhead kick from Okazaki.
United gave Leicester an uncomfortable night, and Okazaki has revealed Ranieri's half-time reaction to his team's performance.
“We’ve got a five-point gap again now, so it was a very important match to win," said Okazaki.
"But the manager was so angry at half-time. He is smiling most of the time, but when we came in at half-time he was mad. He is always joking but maybe to see him angry like that is good for us.
“I think one of the things about this team is that it is so simple, so that helps us to not get pressure. Our spirit is very good for each game – nice and simple. No pressure.
“It’s not easy to switch off but maybe the character of the players is what is good. (Jamie) Vardy, (Riyad) Mahrez, they are so relaxed. They are laughing and joking all the time … no pressure and that’s good.”