“Women of Color in Japan” opens with scenes of what Tokyo is known for: crowds, fashionable teens, trains. Very quickly, however, a voiceover reminds us of what it’s not known for.

“Japan is a place that is known for its futurism,” says the narrator, “but even as a forward-thinking country it is still playing catch up in how it handles diversity.”

The voice we’re hearing belongs to Nigerian American filmmaker Amarachi Nwosu, who this year earned a spot on the Forbes 30 Under 30 Africa list in part thanks to her efforts in dismantling stereotypes in Japan. Her most recent documentary is “Women of Color in Japan,” a short film that follows three women of different ethnicities who navigate their opportunities and challenges in Tokyo.