This Katana vinyl figure is released by Funko in their POP! Heroes x Suicide Squad vinyl figure series.
Funko POP! is a crossover vinyl figure series by Funko and other famous franchises such as Disney, Pixar, DC Comics, Marvel Comics, Simpsons, South Park, Uglydoll, etc. Each POP! figure is about ~3" to ~5" tall and crafted in a Japanese anime/manga super-deformed style (NOTE: due to the unique design of each character, the actual size of the figures may be smaller or bigger than stated).
The POP! Heroes x Suicide Squad series features characters from the 2016 superhero live action movie that is based on the DC Comics antihero team of the same name. In the movie, a secret government agency known as "ARGUS," led by Amanda Waller, recruits imprisoned supervillains to execute dangerous black ops missions as they are forced to become a special team known as "Task Force X" in exchange for clemency and saving the world from an unknown but powerful threat.