Streamers in Japanese wrestling

I was just wondering why before high profile matches in wrestling in japan do they throw streamers at the wrestlers.

Throwing streamers is done or allowed at matches by not all wrestling organizations in Japan.
Even one of the two major professional wrestling organizations in Japan, New Japan Pro-Wrestling, had ever prohibited spectators from throwing streamers at wrestlers until recently, while it has been one of features of the matches by the rival, All Japan Pro-Wrestling.

Though I have no idea whether it is true, the tradition of throwing streamers seems to have started around 1970 as Mitsubishi Electric, the sponsor of the prime-time program of the matches by Japan Pro-Wrestling, wanted to advertise the ability of its cleaner by vacuuming up the scattered streamers and ticker tapes. After Japan Pro-Wrestling separated into All Japan and New Japan, the tradition would be handed down to All Japan.

Anyway, spectators seem to throw streamers just to cheer their own favorite wrestlers or to pump up the hi-profile matches.