SEOUL (Reuters) - As soon as supermarket manager Cho Min-hyuk got to work the day after Tokyo imposed curbs on exports to South Korea, he pulled all Japanese products off the shelves.

It was Cho’s way of taking a stand against Japan in a quickly worsening political and economic dispute between the two east Asian neighbors.

Such anger has prompted a widespread boycott of Japanese products and services, from beer to clothes and travel, disrupting businesses in what was already the worst economic climate for South Korea in a decade.

Cho, who manages a 1,500 square meter Purunemart supermarket in Seoul, is taking the hit voluntarily. Over 200 other supermarkets and grocery stores are doing the same, according to Korea Mart Association, a trade group representing them.

“Japan putting pressure on South Korea through export curbs, showing no regret over its past wrongdoings, is completely unacceptable,” said Cho, adding the 10-15% drop in sales he is already facing won’t change his mind.

Diplomatic tensions intensified since a South Korean court last year ordered Japanese companies to compensate Koreans who were forced to work for Japanese occupiers during World War Two. On July 4, in apparent retaliation, Japan restricted exports of high-tech materials to South Korea, but denied the move was related to the compensation issue. Tokyo cited “inadequate management” of sensitive exports, with Japanese media reporting some items ended up in North Korea. Seoul has refuted that.

BEER, CLOTHES, HOLIDAYS

Seoul has resisted taking any countermeasures, saying it would raise the dispute with the World Trade Organization. But Koreans are taking matters into their own hands, with beer apparently an easy target.

The country's top two convenience stores CU and GS25, run by BGF Retail 282330.KS and GS Retail 007070.KS, told Reuters sales of Japanese beer plunged 21.5% and 24.2%, respectively, in the first two weeks of July from the previous two-week period. E-Mart 139480.KS reported a 24.6% fall.

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Hongcheon Culture Foundation, a beer festival organizer, told Reuters it canceled an order of 1.2 tonnes of Kirin beer even as at last year’s edition the Japanese brand accounted for a tenth of revenues.

South Korea buys 61% of Japan’s beer exports, spending 7.9 billion yen ($73.13 million) in 2018. Asahi Super Dry is the most popular imported brand, with sales tripling in the past five years, according to Euromonitor.

An Asahi spokesman said the company was monitoring developments but declined to comment on the impact.

Screenshots of Japan trip cancellations are trending on social media. Hanatour 039130.KS said it now receives 500 tour reservations for Japan a day, from an average 1,100. Very Good Tour 094850.KQ said new bookings fell 10% while cancellations rose 10% week-on-week.

“If someone did something wrong, they shouldn’t be proud of themselves,” said Lee Sang-won, a 29-year-old designer, who canceled his Japan trip for a 130,000 won ($110.15) fee.

Lotte Home Shopping said it stopped airing TV ads for Japanese tour packages as they expect poor results.

JejuAir 089590.KS and Korean Air 003490.KS reported a "slight drop" in bookings for Japan, with the latter blaming the pulling of the TV ads.

Japan's Fast Retailing 9983.T fashion brand Uniqlo, which sells clothes worth around 140 billion yen - 6.6% of its revenue - in 186 Korean stores, is also feeling the anger.

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“There is a certain impact on sales,” chief financial officer Takeshi Okazaki, told reporters last week, without elaborating.

SPIDERMAN CAUGHT IN WEB

Economists say the tech export curbs could shave 0.4 percentage point off South Korea’s gross domestic product this year. The boycott - if it proves to be more than just a brief burst of nationalistic fervor - could marginally add to that, unless consumers spend on something else.

"We are pleased to see this has turned consumers' favor towards our pens," said Park Seol, assistant manager at stationery maker Monami 005360.KS, whose online sales have risen five-fold since the curbs.

Shinsung Tongsang 005390.KS said its 'national liberation day' limited edition t-shirt by his TOPTEN10 fashion brand sold twice as fast as last year's version.

For now, emotions are running high. Marvel fan Jang Bum-jin, 34, said he threw away all his Japanese pens and is not going to watch the latest Spiderman movie, which is distributed by Sony Pictures - a U.S.-based company owned by Japan's Sony Corp 6758.T.

“I love Spiderman, but I am fighting my desire to watch it,” he said.