TOKYO (AP) -- A Japanese pop star was released Friday after being detained overnight for allegedly being naked and drunk in a Tokyo park, police said.

Tsuyoshi Kusanagi, a member of hugely popular group SMAP, was arrested Thursday after neighbors complained to police that a drunk man was making a fuss in the park in a posh Tokyo neighborhood.

Dozens of reporters and photographers waited outside the Harajuku police station where Kusanagi was held. A silver van carrying him drove quickly away, its curtains tightly closed.

After police questioning and a search of his apartment, Kusanagi was further questioned by prosecutors, who decided on his release, a Tokyo Metropolitan Police spokesman said on condition of anonymity, citing department policy. Police seized nothing from his apartment.

Kusanagi has not been charged. Public indecency carries a penalty of up to six months in prison and a fine of up to 300,000 yen ($3,060).

Public broadcaster NHK said prosecutors decided to release Kusanagi because there is no concern that he would flee or destroy evidence.

Kusanagi's arrest has been the top news item in Japan, with major TV networks making frequent reports.

At the time of his arrest, Kusanagi was sitting on the grass, stark-naked and heavily intoxicated, police said. Media reports said he drank more than 10 glasses of Japanese rice wine and beer before going to the park and had no idea why he undressed himself.

Kusanagi surged to stardom following his debut in 1991 as part of the five-member SMAP, which dominated Japan's pop music scene, and starred in TV dramas and films. Kusanagi, fluent in Korean, is also popular in South Korea.

Toyota Motor Corp. and other companies immediately canceled commercials featuring the star, while TV programs in which he was to appearance were suspended, company officials said.