The dance group is U-Min, who were featured on Missy Elliott’s video of “Ching-A-Ling.” Also see the U-Min videos: (1), (2), etc. The song is Mind Shift by the Japanese band is Genki Sudo.
Other 3Yen posts on sadsack salarymen include:
Salarymen Slog (L)
Salarymen-remix (Samm Bennett’s video for his cover version of Leonard Cohen)