Takenaka Corporation
The core of the facilities is the Matsukata House, built in 1921 as a three-story wooden colonial style house with a basement. Shokuma and Miyo Matsukata, the parents of Tané Matsukata, commissioned the American architect William M. Vories (1880–1964) to design the house. Takenaka Komuten (the Takenaka Corporation) built the house. Seismic tests in 2008 revealed flaws that resulted in the closure of the house until it could be reinforced in 2009.