The President of IGO, he has the appearance of an old man with dark skin and white hair, along with a long white mustache. Despite his old age, he is not yet retired, although seems to vacation frequently, spending time on a private island resort. Ichiryū used to be a very powerful Bishoku-ya and is one of the three disciples of the legendary Bishoku-ya, Acacia, along with Jirō and the boss of the Bishoku-kai. Even in his old age, he is powerful and can defeat Toriko effortlessly in a fight and perform inhuman actions, such as running on water. He appears to have strange mannerisms, like eating the cork of a bottle of liquor, and making the names of dishes Toriko collects. He trains all of the Four Heavenly Kings since their childhood.