"Jukkai (1984)" (十戒 (1984), Jukkai Ichi Kyū Hachi Yon, lit. "Ten Commandments (1984)") is the ninth single by Japanese entertainer Akina Nakamori. Written by Masao Urino and Masayoshi Takanaka, the single was released on July 25, 1984 by Warner Pioneer through the Reprise label. It was also the second single from her sixth studio album Possibility.[1][2] The B-side "Kore kara Naturally" was featured in the compilation albums Complete Single Collection: First Ten Years and Mou Hitori no Akina.
Earlier live and TV performances of the song were known for Nakamori's black outfit and backwards bend.
Nakamori performed the song on the 35th Kōhaku Uta Gassen, making her second appearance on NHK's New Year's Eve special.[3]
The single sold 611,500 copies and became Nakamori's fifth No. 1 hit on Oricon's singles chart and was ranked No. 6 in Oricon's 1984 year-ending chart. It also hit No. 1 on The Best Ten's singles chart and landed on No. 8 on The Best Ten's 1984 year-ending chart. The song earned Nakamori her first Grand Prix at the Nippon Television Music Festival in 1984.[4]