Touch-sensitive, colour changing bra invented

Japanese women can now show off their bonds with their siblings with the help of a new bra that changes colour when touched.

The "Close Sisters Bras" from manufacturer Triumph is made from electronic paper, which acts as a flexible screen.

From blue snowflakes on a white background, the 'Disney's Frozen' inspired bras change colour to a black background with white polka dots or tiny hearts, rocketnews24 reported.

"The depiction, in movies and the like, of sisters helping each other and becoming more confident, have moved all of Japan," the company said in a statement.

The lingerie showcases the "futago kode" trend in Japanese fashion, where women wear matching outfits to recognize and reinforce their friendship.

Two years ago, Triumph had created a bra with cooling gel pads tucked inside, to save energy, and in 2013, it endorsed the Japanese government's plan to increase Japan's GDP by two percent with a golden bra that visually increased bust size by the same amount.