|Released||February 5, 2014|
|Cooperation with||Up-Front Agency|
N20 is the 4th solo photobook by Nakajima Saki, it comes with a making of DVD. It was released on February 5, 2014. A special edition DVD of the photobook's making of was released on March 10, 2014.
- The photobook was released on her 20th birthday, hence the name "N20".
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