On January 19, 2011, "Can't Nobody (English Version)" was released on the Japanese digital retailer Recochoku as a ringtone and ringback tone.
The following month, an accompanying music video was made available for download through iTunes Japan.
Their Japanese debut single "Go Away" was released as a ringtone on March 9, and later used as the theme song for the Japanese television program Mezamashi TV.
On March 16, the quartet's first Korean EP 2NE1 was made available in Japan; promotional activities were canceled due to the Tōhoku Earthquake and tsunami.
2NE1 debuted at #24 on the Oricon charts, selling 3,860 copies in its first week of release.
Initial plans for their official Japanese debut on Music Station were postponed to later that year due to the earthquake, though the quartet did participate in the Naver "Pray for Japan" campaign alongside many other Korean celebrities to raise funds for earthquake victims.

The group returned to South Korea with their second EP 2NE1 (2011), scoring three number one hits: "Lonely", "I Am the Best", which also won the "Song of the Year" award at the Mnet Asian Music Awards, and "Ugly" as well as the top three hit "Hate You".
The album itself was a major success, topping the Gaon Chart and selling over 108,000 copies.
Following the end of promotions in August, 2NE1 held their first sold-out solo concert at the Olympic Hall in the Chamsil Olympic Park on August 26, 27 and 28 in Seoul, South Korea before flying back to Japan.

Choosing to re-record their second EP 2NE1 (2011) in Japanese, the album was re-issued as Nolza and released that same year, peaking at number one on the Oricon charts and selling over 48,000 copies.
Japanese-language editions of "I Am the Best", "Hate You", "Go Away", and "Lonely" were released as singles.
They also commenced the 2NE1 First Japan Tour – Nolza on September 19 and 20 at the Yokohama Arena.
That October, MTV Iggy held a global competition, in which 10 bands from all around the world competed in a voting competition for the title of "Best New Band".
With their song "I Am the Best", 2NE1 was crowned winners of the title on November 10, 2011, making this their first US award.
2NE1 performed at Times Square in December to accept the honor.
At the end of 2011, 2NE1 was also nominated for the Japan Record Award for "Best New Artist", losing to Japanese girl group Fairies.

On March 28, 2012, 2NE1 released their first full-length Japanese album Collection along with their second Japanese single "Scream".
The album includes Japanese remakes of their Korean songs such as "Love Is Ouch", "Fire", and "I Don't Care", and a cover of Madonna's 1984 hit song "Like A Virgin".
Multiple editions of the album were released to include a DVD containing the groups Japanese and Korean music videos, according to Oricon's music website.
The album peaked at #5 on the Oricon Daily Chart and went on to sell over 32,000 copies in Japan.

Later that year, 2NE1 and label mate Big Bang were invited to perform for the first time at 2012's Springroove festival in Japan alongside some of the top American and Japanese hip hop artists.
The previous year, 2NE1 and the subgroup GD & TOP were invited, but due to the Japan tsunami and earthquake tragedy, the festival was cancelled.
2NE1 also collaborated with Japanese hip-hop group M-Flo for the song "She's So (Outta Control)", which was featured on the artist's sixth studio album Square One.
It was released as the leading track from the album, two weeks before the album's release on February 29. "
She's So (Outta Control)" reached number 43 on the Billboard Japan Hot 100 chart.
2NE1 subsequently concluded their Japanese promotions by performing at the 2012 MTV Video Music Awards Japan, which took place on June 23 at the Makuhari Messe.
They also won the "Best New Artist Video" award for their song "I Am the Best".
A non-album single "I Love You" was also released in their home country, topping the chart and becoming their sixth number one single.
That December, 2NE1 and Big Bang made MTV Style's list of "Best Band Style of 2012".
The two Y
On January 19, 2011, "Can't Nobody (English Version)" was released on the Japanese digital retailer Recochoku as a ringtone and ringback tone. The following month, an accompanying music video was made available for download through iTunes Japan. Their Japanese debut single "Go Away" was released as a ringtone on March 9, and later used as the theme song for the Japanese television program Mezamashi TV. On March 16, the quartet's first Korean EP 2NE1 was made available in Japan; promotional activities were canceled due to the Tōhoku Earthquake and tsunami. 2NE1 debuted at #24 on the Oricon charts, selling 3,860 copies in its first week of release. Initial plans for their official Japanese debut on Music Station were postponed to later that year due to the earthquake, though the quartet did participate in the Naver "Pray for Japan" campaign alongside many other Korean celebrities to raise funds for earthquake victims.
The group returned to South Korea with their second EP 2NE1 (2011), scoring three number one hits: "Lonely", "I Am the Best", which also won the "Song of the Year" award at the Mnet Asian Music Awards, and "Ugly" as well as the top three hit "Hate You". The album itself was a major success, topping the Gaon Chart and selling over 108,000 copies. Following the end of promotions in August, 2NE1 held their first sold-out solo concert at the Olympic Hall in the Chamsil Olympic Park on August 26, 27 and 28 in Seoul, South Korea before flying back to Japan.
Choosing to re-record their second EP 2NE1 (2011) in Japanese, the album was re-issued as Nolza and released that same year, peaking at number one on the Oricon charts and selling over 48,000 copies. Japanese-language editions of "I Am the Best", "Hate You", "Go Away", and "Lonely" were released as singles. They also commenced the 2NE1 First Japan Tour – Nolza on September 19 and 20 at the Yokohama Arena. That October, MTV Iggy held a global competition, in which 10 bands from all around the world competed in a voting competition for the title of "Best New Band". With their song "I Am the Best", 2NE1 was crowned winners of the title on November 10, 2011, making this their first US award. 2NE1 performed at Times Square in December to accept the honor. At the end of 2011, 2NE1 was also nominated for the Japan Record Award for "Best New Artist", losing to Japanese girl group Fairies.
On March 28, 2012, 2NE1 released their first full-length Japanese album Collection along with their second Japanese single "Scream". The album includes Japanese remakes of their Korean songs such as "Love Is Ouch", "Fire", and "I Don't Care", and a cover of Madonna's 1984 hit song "Like A Virgin". Multiple editions of the album were released to include a DVD containing the groups Japanese and Korean music videos, according to Oricon's music website. The album peaked at #5 on the Oricon Daily Chart and went on to sell over 32,000 copies in Japan.
Later that year, 2NE1 and label mate Big Bang were invited to perform for the first time at 2012's Springroove festival in Japan alongside some of the top American and Japanese hip hop artists. The previous year, 2NE1 and the subgroup GD & TOP were invited, but due to the Japan tsunami and earthquake tragedy, the festival was cancelled. 2NE1 also collaborated with Japanese hip-hop group M-Flo for the song "She's So (Outta Control)", which was featured on the artist's sixth studio album Square One. It was released as the leading track from the album, two weeks before the album's release on February 29. "She's So (Outta Control)" reached number 43 on the Billboard Japan Hot 100 chart. 2NE1 subsequently concluded their Japanese promotions by performing at the 2012 MTV Video Music Awards Japan, which took place on June 23 at the Makuhari Messe. They also won the "Best New Artist Video" award for their song "I Am the Best". A non-album single "I Love You" was also released in their home country, topping the chart and becoming their sixth number one single. That December, 2NE1 and Big Bang made MTV Style's list of "Best Band Style of 2012". The two Y
2NE1