Many Japanese people on social media said the trademarked brand, Kimono Intimates - a play on her name - disrespected traditional clothing.
The reality-star-turned-designer, however, told the New York Times, it was a "nod to the beauty and detail" that goes into a kimono.
The loose long-sleeved robe dates back to 15th Century Japan.
She added: "I understand and have deep respect for the significance of the kimono in Japanese culture.
"My solutionwear brand is built with inclusivity and diversity at its core and I'm incredibly proud of what's to come."
