Owned by South Korean Naver, Line reportedly attracted investment from SoftBank and Alibaba Group earlier this year, and plans to hold a media event about its business strategy on October 9, sparking rumours that Softbank could again be interested in the firm.
A source with knowledge of the situation told Reuters in July that Naver was not considering a stake sale to either Softbank or Alibaba.
However, Line has reportedly now submitted applications in both New York and Tokya for an initial public offering.