Question: What year did they start building Disneyland Tokyo?
About the article "Tokyo Disneyland", section "History".

Candidate passages:
As of 2006, the Pass is valid to the following parks: Disneyland Resort (Disneyland, Disney California Adventure Park), Walt Disney World Resort (Magic Kingdom, Epcot, Disney's Hollywood Studios, Disney's Animal Kingdom), Disneyland Paris (Disneyland Park, Walt Disney Studios Park), Hong Kong Disneyland Resort (Hong Kong Disneyland).
When Passes were renewed at the start of 2005, the Hong Kong Disneyland Resort was still under construction and it was noted on the Pass that it would not be valid for entry.
This was changed in 2006.
The two parks at the Tokyo Disney Resort - Tokyo Disneyland and Tokyo DisneySea - are not part of the allowance, as they are owned and operated by The Oriental Land Company under licenses from Disney.
On May 2, 2006, Disney honored the two billionth guest of a Disney park at Disneyland.
The guest received a modified version of the Golden Pass - this time, it entitled admission to the two theme parks at the Tokyo Disney Resort.
The Oriental Land Company allowed this because the two billion count included guests at Tokyo Disneyland and Tokyo DisneySea.
On February 7, 2008, 2 Golden Passes were given to the first 2 babies born in the Year of the Rat in Hong Kong.  
In April 1979, the first basic contract for the construction of Disneyland in Tokyo was signed.
Japanese engineers and architects flocked to California to tour Disneyland and prepare to construct the new operating dreamland in Tokyo.
Just one year later, construction of the park began and was covered by hundreds of media reporters as an indication of the high expectations for the park in the future.
Though successful in the building process, the final cost of Disneyland Tokyo almost doubled the estimated budget costing 180 billion yen rather than the projected 100 billion yen.
Despite this discrepancy, Disneyland Tokyo has been a constant source of pride since opening day over 30 years ago.
  "Disney Carnivale" - Tokyo Disneyland  "Tokyo Disneyland Electrical Parade" - Tokyo Disneyland  "Disney's Fantillusion" - Tokyo Disneyland  
Before he wrote the book called "Swiss Family Robinson", Johann Wyss and his kids imagined what it would be like if they were stranded on an island.
So together, they came up with lots of crazy adventures for the Robinsons.
Almost two years after the Disney film "Swiss Family Robinson" was released to theaters in 1960, Disneyland introduced the "Swiss Family Treehouse" to Adventureland.
When the Magic Kingdom opened at Walt Disney World Resort on October 1, 1971, the "Swiss Family Treehouse" was one of the original attractions of Adventureland.
The tree, while intended to look real, is actually made up of steel, concrete, and stucco, stretching tall and wide.
Yet, it looks exactly like the one in the movie.
Similarly, when "Euro Disneyland" (now Disneyland Park) opened on April 12, 1992, it featured a version of the attraction located in Adventureland, named La Cabane des Robinson.
Tokyo Disneyland also has a Swiss Family Treehouse, a late addition to the park; not opening until 1993.
In 1999, the original attraction at Disneyland was closed and reopened the same year as "Tarzan's Treehouse."
The Hong Kong Government has made it clear to the public and Disney that there is land next to the resort for a second theme park and several more hotels, but with a much higher price than what Disney paid for the land they already own, the government is liable to sell the land to one of Disney's theme park industry rivals.
Names rumoured to be looking at the land feature NBC Universal, Six Flags and Anheuser Busch.
Many view this move as a way of getting more money out of Disney, as the government does not actually want another company to build a separate theme park in the area.
Currently, a new shopping district (see Downtown Disney) and the third hotel are taken into discussions.
For long-term construction, with the reclaimed land reserved for the Phase Two Extension and the Disneyland park being blocked by the Park Promenade, a pedestrian walkway which links the Disneyland Resort Station, Disneyland park, Hong Kong Disneyland Hotel, and Disneyland Resort Pier.
It is expected that a second Disney theme park will be built on that site.
A Phase Three Extension is also being considered by the Walt Disney Company and the Hong Kong Government.
On 10 January 2012, The Standard reports that Hong Kong Disneyland plans to build 4 more hotels.
Disneyland's proposal includes building one large hotel and three smaller vacation-style hotels to be connected by a mini-tram system.
On 14 June 2012, the Hong Kong Economic Times reports that the Government of Hong Kong is hoping to start discussion with Hong Kong Disneyland about building a second Disney theme park for the resort.