Short answers, pulled from the story.
Junya Nakano is best known for scoring Threads of Fate and co-composing Final Fantasy X for Squaresoft. He also scored arcade games including X-Men and Mystic Warriors for Konami, and arranged the Nintendo DS version of Final Fantasy IV for Square Enix.
Nakano was employed by Squaresoft and then Square Enix from 1995 to 2009. He left Square Enix on the 31st of December 2009 to join the supergroup GeOnDan.
Nakano contributed 20 pieces to Final Fantasy X in 2001. He was selected alongside Masashi Hamauzu to assist Nobuo Uematsu because their styles differed from Uematsu's, providing the score a broader range.
Nakano is known for ambient music with percussive, timbral, and rhythmic elements. After joining Square in 1995 he shifted his focus toward rhythm and timbre, and later toward harmony and melody. His score for Threads of Fate drew on ambient, jazz, and Spanish music influences.
Nakano's most frequent collaborator was Masashi Hamauzu, whom he met while working on Front Mission: Gun Hazard and Tobal No. 1 in 1996. He also worked repeatedly with Yuji Takenouchi, his former mentor from his time at Konami.
Nakano was born in Kyoto, Japan. His parents introduced him to music at age three through Yamaha Music Foundation electronic organ lessons. He began composing MIDI music on a NEC PC-9801 in 1985.