These demonstrations come after The New York Times reported that a Google executive received a $90m payout after leaving the company following a "credible" allegation of sexual misconduct made against him.
The walkout started in Google's Asian offices in Singapore and India at 11:10 AM local time, spreading to London, Dublin, and NY at the appointed hour.
The exercise in armchair protesting came in the wake of a New York Times story that detailed allegations of sexual misconduct against a handful of Google employees including Android software creator Andy Rubin and Richard DeVaul, a director at Google's X lab, which has worked on the self-driving auto and Internet-beaming balloon projects.
"Employees have raised constructive ideas for how we can improve our policies and our processes going forward", he said.
Mr Pichai said in a statement: "We are taking in all their feedback so we can turn these ideas into action".
The organisers said that almost two thirds of Google's global offices are involved in the walkout, demanding change - after advocating for it for years.
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About 1000 employees at Google's headquarters in San Francisco walked off the job for half an hour on Thursday, chanting: "Women's rights are workers' rights!"
The New York Times writes that more than 1,500 employees are expected to walk out today.
But it was revealed by the Times that Google executives asked for Rubin's resignation after an employee accused Rubin of sexual misconduct, specifically that he coerced the female employee to perform oral sex.
Part of the employees' concerns are the allegations that Google gave two fired senior executives "exit packages" upon their dismissal.
Despite his assurances, employees' discontent over the matter continued to increase, which ultimately led to the employees staging a protest on Thursday.
Among them is a call for Google to "end pay and opportunity inequity", and to start publishing a transparency report over sexual harassment cases at the company. At the conference that was conducted around the same time walkouts were held globally by Google employees, Pichai said, "We don't run the company by referendum". Most have not been told, ' organisers said.
Soon after the article was published, another executive, Richard DeVaul, resigned amid allegations of making unwanted advances toward a woman he was looking to employ. There should be a representative for employees on the board, the walkout leaders added.