Narita, Japan ? Japanese officials kept Paris Hilton at Narita International Airport for a second day today while they decide whether she will be admitted to the country after pleading guilty to a misdemeanor drug charge in Las Vegas.

The 29-year-old celebrity was stopped by immigration authorities upon her arrival in Japan on Tuesday, one day after her plea, according to an e-mailed statement by Hilton’s representative, Dawn Miller.

Hilton spent the night at an airport hotel after being questioned by officials. She was scheduled to appear at a news conference in Tokyo today to promote her fashion and fragrance lines, but that appearance was canceled.

“We interviewed her yesterday and we may interview her again today. We are continuing the immigration process to determine whether she can enter Japan or not,” said Kazuo Kashihara, an immigration official at Narita.

Under Japanese law, immigration authorities are empowered to deny entry to those who have been convicted of drug-related offenses.