South Korea's K-pop culture growing in Japan
2 January 2012 Last updated at 06:32 GMT
South Korea's K-pop music has overtaken Japanese music as the industry's most popular genre in the country.
Relations between the two countries have been difficult after Japan's colonisation of Korea in the first half of the 20th century.
But with the growing popularity of Korean culture, will attitudes to people of Korean origin, who make up a large ethnic minority in Japan, soften?
Roland Buerk reports.