A Japanese firm is venturing into the food business, producing chocolate, candy, tea and sake, all colored blue, with the help of farmers in Laos and Thailand to create a market for colored food around the globe.

Tsujiko Co., a manufacturer of LED lighting devices and plant factory systems, has succeeded in extracting blue pigment for such uses from organically grown butterfly peas.

Its blue sake was served at a banquet for the leaders of five nations in the Mekong region, including Lao Prime Minister Thongloun Sisoulith, in Tokyo last October, when they were hosted by Prime Minister Shinzo Abe, said Tsujiko President Akihisa Tsuji.