A quarter is one fourth, ¹⁄₄, or 25%, and may refer to:

Kei Nishikori (錦織 圭, Nishikori Kei^?) (born 29 December 1989 in Matsue, Shimane, Japan) is a Japanese tennis player, currently ranked World No. 17 as of April 2, 2012. He began playing tennis at the age of five and qualified for his first ATP main draw event at the Countrywide Classic in Los Angeles, California at the age of 17.^{[citation needed]}

Nishikori won the 2004 title at the Riad 21 Tournament in Rabat, Morocco and was a quarterfinalist at the 2006 Junior French Open. He partnered with Emiliano Massa to win the 2006 Junior French Open. Nishikori won the 2007 Luxilon Cup held at the 2007 Sony Ericsson Open by defeating Michael McClune.

Nishikori qualified and won the title at the ITF Futures event in Mazatlán, Mexico. He began the year by receiving a wildcard to the Kyoto Challenger in Kyoto, Japan.

A finalist in two USTA Pro Circuit events, Nishikori lost to Donald Young in Little Rock, Arkansas and Alex Bogomolov, Jr. in Carson, California. He partnered with Donald Young to win the doubles title at Little Rock. He paired with triple-French Open champion Gustavo Kuerten at the Sony Ericsson Open in Miami, Florida, where they lost in the first round. Nishikori served as a hitting partner for Roger Federer at Wimbledon.

James Newton Howard (born June 9, 1951) is an American composer best known for his scores to motion pictures. He is one of the most popular and respected composers for cinema, and has scored over 100 films. The recipient of eight Academy Award nominations, some of Howard's best known film scores include The Prince of Tides (1991), The Fugitive (1993), Dinosaur (2000), King Kong (2005), I Am Legend (2007), and, most recently Green Lantern (2011) and The Hunger Games (2012). He is also known for his collaboration with director M. Night Shyamalan, having scored all his films since The Sixth Sense (1999).

Howard was born in Los Angeles, California. Twenty-five years after the death of his father, Howard learned that his father's family was Jewish (Howard later became a practicing Reconstructionist Jew).

Throughout his career as a composer/musician/songwriter, he has scored films of all scales and genres, earning multiple award nominations for his work. Howard began studying music as a child and went on to attend the Thacher School in Ojai, California, the Music Academy of the West in Santa Barbara, California, and then majored in piano performance at the University of Southern California.

James W. Newton (born May 1, 1953, Los Angeles, California, United States) is an American jazz flautist, composer, and conductor.

From his earliest years, James Newton grew up immersed in the sounds of African American music, including urban blues, rhythm and blues, and gospel. In his early teens he played electric bass guitar, alto saxophone, and clarinet. In high school he took up the flute, influenced by Eric Dolphy and Roland Kirk. In addition to taking lessons in classical music on flute, he also studied jazz with Buddy Collette. He completed his formal musical training at California State University, Los Angeles.

From 1972 to 1975, together with David Murray, Bobby Bradford, and Arthur Blythe, Newton was a member of drummer (and later critic) Stanley Crouch's band Black Music Infinity. From 1978 to 1981 he lived in New York, leading a trio with pianist and composer Anthony Davis and cellist Abdul Wadud. These three played extended chamber jazz and Third Stream compositions by Newton and Davis. With Davis, Newton founded a quartet and toured successfully in Europe in the early 1980s. Afterwards, he performed with a wide variety of musicians, including projects by John Carter and the Mingus Dynasty. Newton has released four recordings of his solo improvisations for flute. He has also worked with Herbie Hancock, Bobby Hutcherson, Lester Bowie, Leroy Jenkins, Chet Baker, Kenny Burrell, David Murray and Andrew Cyrille. Since the 1990s Newton has often worked with musicians from other cultural spheres, including Jon Jang, Gao Hong, Kadri Gopalnath, and Shubhendra Rao, and has taken part in many cross-cultural projects.