"Akihabara-Shibuya style") is a loosely defined trend from the 2000s that involved an increase of Shibuya-kei influence in anime soundtracks.
[1] In 2002, Shibuya-kei band Round Table invited female singer Nino as the guest vocal and offered the song "Let Me Be With You" for anime Chobits.
From then, Masao Fukuda from FlyingDog, the musical director of Chobits appointed many Shibuya-kei musicians as anisongs/anime soundtracks composers.
[2] Dimitri from Paris (a Turkish-born French DJ) provided the song “Neko Mimi mode” to Tsukuyomi: Moon Phase as the opening theme.
[4] In writing about the compilation, W. David Marx of Diamond Agency remarked on the merger of Shibuya-kei and Akiba-kei: "Both subcultures strongly share one thing: The members are 'nerds' in the sense of being deeply obsessed with pop culture.