The Nan'yō Kōhatsu Kabushiki Kaisha complex was the main support base of the Nan'yō Kōhatsu Kabushiki Kaisha (NKKK) on the island Tinian in the Northern Mariana Islands.

In the Northern Marianas, the company aggressively developed arable areas for sugar cane farming, importing workers from Japan, Okinawa, and Korea.

Of this large complex, only four buildings or structures remain, all of which have been listed on the United States National Register of Historic Places, as rare surviving examples of pre-war Japanese architecture on the islands.

[2] The remains of the NKKK Administration Building are on the west side of San Jose, consisting of an unpainted concrete frame whose wooden elements, including the roof, are long gone.

The main entrance, to the east, is identifiable by a canopy with unique fascia detailing not found on other surviving NKKK buildings in the region.