Deka Wanko (デカワンコ) is a Japanese manga series written and illustrated by Kozueko Morimoto.

It was serialized in Shueisha's josei manga magazine You from April 2008 to January 2013, with its chapters collected in 12 tankōbon volumes.

The series follows the adventures of Ichiko Hanamori, a young woman who, while always dressing in lolita fashion, is also a homicide detective for the Tokyo Metropolitan Police.

Written and illustrated by Kozueko Morimoto [ja], Deka Wanko started in Shueisha's josei manga magazine You on April 1, 2008.

[8] A 10-episode television drama adaptation, starring Mikako Tabe as Ichiko Hanamori ("Wanko"), was broadcast on Nippon TV from January 15 to March 26, 2011.