Chikako Watanabe (Vocal) and Shigeo Tamaru (Guitar/Producer) came together to form NaNa in 1996. NaNa's chief goal was to create high quality demo tapes that would showcase their music to the world market. In the summer of 1997, NaNa got an offer from Ryuichi Sakamoto to be on his Radio show, and they appeared on the program. That was what led NaNa into their debut from Sakamoto's label. NaNa's first EP topped the Tower Records charts in Tokyo. Afterward they released two albums and four EP from Gut/Forlife label and Warner Music Japan. After those albums release, The following year, 2007, they started digital distribution on iTunes, Amazon. Then they have since increased the number of the listeners little by little in the different countries. Starting in 2007, NaNa's tracks have gradually received air-play primarily in UK and US. As of 2010, their music came to be listened to all over the world via local and Satellite Radio, and BBC regardless of the type of Radio station. In 2011, NaNa was ranked on the Billboard Magazine's (USA) charts. Spent 13 weeks from Feb 2011 on the Billboard Uncharted, climbed to #12 place. and also they ranked in the chart on the Billbord Brasil chart on April. On Dec.2011, ranked #41 place on the Billboard's The Best of 2011(Year-End Chart, USA) as well. A long-awaited NaNa's fifth EP 'RIDE' has been released in 2012. The numbers are produced in response to being ranked on the Billboard. In 2013, the single track 'Unbelievable World' that is a sequel to 'RIDE' has been released from Warner Music Japan. The title tune follows in the previous single and is a further evolution of electronica track. In contrast, the B-side track 'Tokyo, Slow Down' showed oriental and pop finish. The both tracks have further their perfection and their new worldview. The single has been released on iTunes and further download shop in 111 countries by Warner Music Japan on 13 February 2013. In March of that year, their second album "Imaginary man" that was released in 2002 is just set for re-release in Mar 2013 from Warner music japan. In addition to their original twelve tracks, "The Plain Jane" that has been "out-track" in 2002 is included in that album as a bonus track. "Imaginary man (Bonus Track Version)" will be available on Mar 13th 2013 on iTunes of each country including Japan.