Police Raid Starbucks Korea Headquarters as ‘Tank Day’ Boycott Crisis Deepens

South Korean police have searched Starbucks Korea’s headquarters in Seoul, escalating a controversy that has already cost the company its chief executive, damaged sales and drawn the coffee chain into a political dispute.

The August 5 raid centred on the “Tank Day” promotion launched nearly three months earlier. Around 40 investigators reportedly entered the company’s Gangnam headquarters seeking campaign documents, internal communications, approval records and mobile-phone evidence.

Police are trying to determine whether the promotion was a serious failure of corporate judgment or whether its references to South Korea’s authoritarian past were used deliberately.

According to Yonhap News Agency’s report on the police operation, the search concerned allegations that the campaign insulted people associated with the May 18 pro-democracy movement. The warrant reportedly cited a suspected insult offence, while civic complaints also included defamation allegations.

No criminal responsibility has been established. The search allows police to collect evidence but does not mean the company, its executives or employees have been found guilty.

Why ‘Tank Day’ caused national anger

Starbucks Korea launched the promotion on May 18, 2026, to advertise discounts on large “Tank” coffee tumblers.

May 18 marks the beginning of the 1980 Gwangju Uprising, when citizens and pro-democracy demonstrators resisted military rule. Forces controlled by dictator Chun Doo-hwan violently suppressed the movement, with hundreds believed to have been killed.

For many South Koreans, placing “Tank Day” beside the May 18 date appeared to evoke the military vehicles associated with the crackdown. The backlash over the campaign’s connection to the Gwangju tragedy quickly spread from social media to civic organisations and political circles.

The campaign also included wording translated as “Tak on the table” or “Thwack it on the desk.” Critics linked it to the 1987 death of student activist Park Jong-chul in police custody.

Authorities initially claimed Park collapsed after an investigator struck a desk and made a “tak” sound. It later emerged that he had been tortured. His death became an important catalyst in South Korea’s movement towards democracy.

The combination of the date, “Tank Day” name and desk-related wording led critics to question how several sensitive references passed through a major company’s approval process.

Shinsegae Group, which controls Starbucks Korea, said its internal audit found no evidence of deliberate intent. It concluded that the marketing team and senior managers failed to recognise the historical associations.

However, three of the five employees involved in planning the promotion reportedly refused to submit their mobile phones. Police may now recover communications that Shinsegae’s investigation could not examine.

Boycott, falling sales and political division

Starbucks Korea withdrew the promotion and apologised. Shinsegae dismissed chief executive Sohn Jeong-hyun, making the CEO’s removal following the Tank Day backlash the first major leadership consequence.

Shinsegae chairman Chung Yong-jin later apologised publicly, while Starbucks’ US headquarters sent an apology to representatives of Gwangju victims.

Starbucks Korea operates through SCK Company and is controlled by Shinsegae through E-Mart. Starbucks Corporation retains a minority interest but has not exercised day-to-day operational control in South Korea since 2021.

More than 2,000 Korean stores closed early for one day in June so employees could attend modern-history and social-sensitivity lessons. Some airport locations remained open.

Customers continued calling for a boycott, deleting the Starbucks app and seeking prepaid-account refunds. Reported payment data showed card transactions falling about 26% during the first week of the backlash. May payment volumes were also around 10% lower than in April.

President Lee Jae Myung accused the campaign of insulting Gwangju victims, while the interior ministry announced a government-level boycott. Opposition figures accused the administration of overreach, and Starbucks cups subsequently appeared at some right-wing rallies and in conservative livestreams.

Investigators must now separate poor judgment and weak supervision from evidence of criminal intent. The seized records may determine whether the campaign remains an extraordinary corporate failure or develops into criminal proceedings against people involved in creating and approving it.