The May 8-10 visit aims to strengthen bilateral relations and promote further Japanese investment into Peru, with a focus on social inclusion.
President Humala was welcomed with military honors upon his arrival at Haneda International Airport in Tokyo.
Humala will begin his visit by attending a dinner hosted by representatives from the Japan-Peru Business Committee (Cepeja).
Cepeja seeks to promote business interactions between companies of both countries and foster economic cooperation, cultural exchange and good relations.
The delegation traveling with the president includes Foreign Minister Rafael Roncagliolo and Finance Minister Luis Miguel Castilla. Humala is also accompanied by his wife, First Lady Hadine Heredia.
The president will continue his Asia tour with a visit to South Korea.