1984 (MCMLXXXIV) was a leap year that started on a Sunday, in accordance with the Gregorian calendar. It is the 1984th year of the Common Era or A.D.; the 984th year of the 2nd millennium; the 84th year of the 20th century; and the 5th year of the 1980s decade.

Haruomi Hosono (細野 晴臣, Hosono Haruomi^?, born July 9, 1947 in Minato, Tokyo), also known as Harry Hosono, is a renowned Japanese musician, best known internationally as a key member of the rock band Happy End and the pioneering electronic music band Yellow Magic Orchestra.

Hosono first came to attention in Japan as the bass player of the psychedelic rock band Apryl Fool, who released the album The Apryl Fool in 1969. Members from this band (including Hosono) then formed the influential folk-rock group Happy End. One of the songs he wrote for Happy End, "Kaze wo Atsumete" (1971), later appeared in the film Lost In Translation and its soundtrack in 2003. After Happy End disbanded around 1974, Hosono worked with a loose association of artists making "exotica"-style music under the title Tin Pan Alley.

His involvement in electronic music also dates back to the early 1970s, when he performed the electric bass for Inoue Yousui's folk pop rock album Ice World (1973) and Osamu Kitajima's progressive psychadelic rock album Benzaiten (1974), both of which were electronic rock records utilizing synthesizers, electric guitars, and in the latter, electronic drums and rhythm machines.