A tatami (畳^?) is a type of mat used as a flooring material in traditional Japanese-style rooms. Traditionally made of rice straw to form the core (though nowadays sometimes the core is composed of compressed wood chip boards or polystyrene foam), with a covering of woven soft rush (igusa) straw, tatami are made in standard sizes, with the length exactly twice the width. Usually, on the long sides, they have edging (heri) of brocade or plain cloth, although some tatami have no edging.

The term tatami is derived from the verb tatamu, meaning to fold or pile. This indicates that the early tatami were thin and could be folded up when not used or piled in layers. Tatami were originally a luxury item for the nobility. During the Heian period, when the shinden-zukuri architectural style of aristocratic residences was consummated, the flooring of shinden-zukuri palatial rooms were mainly wooden, and tatami were only used as seating for the highest aristocrats. In the Kamakura period, there arose the shoin-zukuri architectural style of residence for the samurai and priests who had gained power. This architectural style reached its peak of development in the Muromachi period, when tatami gradually came to be spread over whole rooms, beginning with small rooms. Rooms completely spread with tatami came to be known as zashiki (lit., room spread out for sitting), and rules concerning seating and etiquette determined the arrangement of the tatami in the rooms. It is said that prior to the mid-16th century, the ruling nobility and samurai slept on tatami or woven mats called goza, while commoners used straw mats or loose straw for bedding.

Antoine Christophe Agbepa Mumba, also known as Koffi Olomide (Friday, August 13, 1956), is a DR Congolese soukous singer, dancer, producer, and composer. He is also known by a multitude of other names and aliases.

He was born in Kisangani, in the Democratic Republic of Congo. His father is Congolese (Gbandi tribe from Equateur region) and his mother was born from a Sierra-Leone father and a Congolese mother (Songye tribe from Kasaï region). According to the ethnic custom of his Sierra-Leone grand father, his mother named him 'Koffi' because he was born on a Friday . Koffi grew up in the city of Kinshasa, the capital of the Democratic Republic of the Congo, in a middle-class family, where education was valued.

He was a very bright student. He earned a scholarship and went to study in Bordeaux, France where he obtained a Bachelors Degree in Business Economics. He is also reported to hold a Masters Degree in Mathematics from the University of Paris.