"The gesture was saying that I wish he would look at me like one of them and maybe he'd throw me an easy pitch so I can do something, " Gurriel said, according to USA Today.
Darvish termed Gurriel's ugly gesture "disrespectful" but was mostly in a forgiving mood, suggesting it be a learning experience.
The 33-year-old played for a year in Japan and later apologised for an "offensive gesture that was indefensible".
"He has handled this entire hard situation in an exemplary way", Manfred said of Darvish.
"In Cuba we call everybody who is from Asia 'Chino, '" Gurriel explained.
"I believe based on my conversation that he understood that both the language and the gesture were offensive", Manfred said. "I would also like to apologize to the Dodgers organization, the Astros, Major League Baseball and to all fans across the game", he said.
Gurriel drew cheers when he batted in the second inning of Game 4 on Saturday night.
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"No-one is ideal", Darvish posted on social media.
Darvish was born to a Japanese mother and an Iranian father.
Astros general manager Jeff Luhnow said the team was "surprised and disappointed" by Gurriel's behavior and supported Manfred's decision.
"There is no excuse or explanation that makes that type of behavior acceptable".
'I see a difference between behaviour from one player directed specifically at a player and a logo, ' he said.
And yet, the suspension beginning next season means Gurriel is back in the Astros' lineup tonight.
But even if Major League Baseball elects to suspend Gurriel, he's nearly certain to appeal, which likely would delay the process so that a decision isn't made until after the World Series.