Sadanosuke Hata was a Japanese businessman who built a historic structure called the S. Hata Building in Hilo, Hawaii, in 1912. It now contains specialty shops, professional offices, a restaurant, and the Mokupāpapa Discovery Center, a visitors center for the Northwestern Hawaiian Islands. Sadanosuke's younger brother Yoichi Hata was another notable Japanese businessman who founded a major wholesale food distribution company in Hawaii.
At the time it was built, almost all other structures in Hawaii outside of Honolulu were built of wood. The building is about 109 feet (33 m) by 60 feet (18 m) of reinforced concrete. Such a large masonry building indicated the upward mobility of the Japanese population. The Hilo Masonic Lodge, Hilo Federal Building and Volcano Block Building are the others from that period that remain. The first floor has several store-fronts.
In May 2003, the Mokupāpapa Discovery Center opened in the restored S. Hata building.It displays educational interactive exhibits on the Northwestern Hawaiian Islands, which are protected along with their surrounding waters as the Papahānaumokuākea Marine National Monument.The name comes from Moku pāpapa in the Hawaiian language which means "flat reef island". This name was used in chants of Ancient Hawaii, perhaps referring to the area now known as French Frigate Shoals, or the northwestern islands in general.