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Tokyo - Smartphone messenger application Line, which has hundreds of millions of users across Asia, was urging people to change their passwords on Thursday as Japanese police investigated the hacking of hundreds of accounts.
At least 303 cases of unauthorised access were confirmed between late May and 14 June, including three that involved cash trades resulting in financial loss, a Line spokesperson said, without providing further details.
"We are co-operating with police in investigating the cases, and we are calling for users to change passwords," the spokesperson said.
The accounts were hacked "presumably after shared passwords with other online services were leaked somewhere else", he said, adding that to the company's knowledge, all of the breaches occurred in Japan.
A police representative said the case was under investigation.
Set up in 2011, Line now has more than 400 million users, mainly in Japan and mainland Asia, and is growing fast.
The service lets users make free calls, send instant messages and post funny photos or short videos, combining attributes from Facebook, Skype and messaging application WhatsApp.
Line has forged heavyweight partnerships with football clubs FC Barcelona and Real Madrid, brands such as Coca-Cola and tennis star Rafael Nadal.
FC Barcelona, for instance, has a home page on the app which has millions of "friends".
One of Line's main selling points is its "stickers" - funny, cartoon-like figures that users can post to friends.
Dwango, the operator of the high-profile Niconico video sharing forum, reported last week more than 200 000 accounts had been hacked.
At least 303 cases of unauthorised access were confirmed between late May and 14 June, including three that involved cash trades resulting in financial loss, a Line spokesperson said, without providing further details.
"We are co-operating with police in investigating the cases, and we are calling for users to change passwords," the spokesperson said.
The accounts were hacked "presumably after shared passwords with other online services were leaked somewhere else", he said, adding that to the company's knowledge, all of the breaches occurred in Japan.
A police representative said the case was under investigation.
Set up in 2011, Line now has more than 400 million users, mainly in Japan and mainland Asia, and is growing fast.
The service lets users make free calls, send instant messages and post funny photos or short videos, combining attributes from Facebook, Skype and messaging application WhatsApp.
Line has forged heavyweight partnerships with football clubs FC Barcelona and Real Madrid, brands such as Coca-Cola and tennis star Rafael Nadal.
FC Barcelona, for instance, has a home page on the app which has millions of "friends".
One of Line's main selling points is its "stickers" - funny, cartoon-like figures that users can post to friends.
Dwango, the operator of the high-profile Niconico video sharing forum, reported last week more than 200 000 accounts had been hacked.
