To be a Shinto Shrine or Jinja (神社), outside of Japan, an owner of a shrine in Japan, (Someone who has had generations of family members running a shrine) would have to disassemble a Shrine in Japan, pack it up and haul it to its new place, (for example, Washington State) and reassemble the Shrine to as close to the original as possible. Shinto started out as Japan's first state religion until Buddhist monks came a bit later from China. It was such at the time that people rejected Buddhism, until one Priest managed to intertwine Shinto and Buddhism..and from there, different sects competed for the "souls" of the Japanese people. Those who started Shrines in the early periods of Japan's History, kept them in the family, through generations, and so Priests and Shrine maidens (called Miko) kept the Shrines going.
Shinto Priest and Miko or Shrine Maiden. Often Shrine maidens are daughters of the Priests, or
can be related to the family that owns the Shrine. They can also be brought into service by friends of the family to perform as shrine maidens.As far as I am aware only Hawaii and Washington State have Shinto shrines, and thats because family members moved there. Often times, all it took, was to bring a few key pieces, (not the entire building or items on the property) and set up shop, so to speak, in a new land.
Living near Nihonmachi (Japantown) I was always surprised there were no shrines here, but then, as stated above, it would have to be brought over by a Shrine family member, and no one has ever done so. Unlike a Buddhist Temple, a Shinto Shrine can not just suddenly appear some where at random, because of the need for a shrine.
Here is the website for the Shrine in Washington state:
http://www.tsubakishrine.org/