I'm going to play a game with myself and see if I'm right, not checking the Google until after I post this paragraph...
I think the hotel was actually built in 1986. It was called the "Emerald of Anaheim", and it was owned by some Japanese firm. Then it changed hands in the early 1990's and became the Pan-Pacific Hotel. Disney bought it around 1996-ish and it was "Disney's Pan-Pacific" before it was branded as the Paradise Pier Hotel just before the 2001 opening of DCA. It has to be the least attractive and least themed hotels in the Disney Empire since the Hotel Plaza Blvd. hotels of the 1970's built adjacent to WDW's Lake Buena Vista development.
Doh! I checked the Google and the Wikipedia page offered this info that is closer to the
@NobodyElse version of obscure Anaheim history than my own.
"The hotel was originally built and owned by Japan-based Tokyu Group, and opened in 1984 as the Emerald of Anaheim. It was renamed Pan Pacific Hotel, Anaheim in 1989 when Tokyu merged its Emerald and Pan Pacific hotel divisions. Disney purchased the hotel from Tokyu in 1995 and renamed it Disneyland Pacific Hotel. The hotel was rebranded as Disney's Paradise Pier Hotel on December 15, 2000, named after the waterfront land in Disney California Adventure Park that the hotel tower overlooks."