This is a work in progress.
Shibuya Punk is an aesthetic based on various media that surrounds inline-skating, graffiti, street gangs, or all of the following in an urban setting.
The style originated with a Sega Dreamcast game known as Jet Set Radio (or Jet Grind Radio in some areas), which was praised for its distinct art direction at the time. The game follows a small roller-skating, graffiti-tagging gang called the GG's, who fight for turf dominance with other groups such as the Love Shockers, Poison Jam, Noise Tanks, etc. The game also has you attempting to run away from the police and its eccentric captain, Captain Onishima, from time to time. The game immediately gained a cult-following, and would have its style, art and music inspire indie titles in recent times. These games include, but are not limited to; Lethal League and Blaze, Hover, Bomb Rush Cyberfunk, No Straight Roads, Butterflies, and more. These games furthered the style that is known today as Shibuya Punk.
Another game that may have inspired the style is The World Ends With You. Much like JSR, the game is also is rather stylish, and involves characters combatting in an urban city. The game also has a notable artstyle and hip-hop and rock inspired music.
An anime known as Air Gear debuted in the 2000s, which also features roller-skating gangs.
Music for Shibuya-kei/Shibuya Punk is varied and unique. The most notable genre is "Naganuma-kei", a term coined by Sashko Naganuma (check video description). This a term to describe a type of music made by famous video-game music composer Hideki Naganuma and fans of him. Naganuma-kei is a upbeat, catchy genre that takes inspiration from hip-hop, downtempo, drum n' bass, jungle, big beat, chiptune, and other 90s and Y2K-styled music.
Underground and lesser-known alternative music are key staples of Shibuya Punk in general.