The Residential house of Hachirouemon Mitsui, located inside the Edo Tokyo Tatemono-en, in Koganei City, Tokyo, was originally built in Kougai Town (now Nishi Azabu 3 Chome, Minato-ku), in 1952.
The house has a guest room, dining room, kitchen and service room on the first floor and a bedroom, bath room and butsuma room, the room where the family Buddhist altar is placed, on the second floor.
The house, in its original location was burned down during the war. To restore it, many rooms, building materials and stones were transferred from other Mitsui family houses located around Japan. The guest room, transferred from Kyoto, was built in 1897 and kitchen and warehouse were from Meiji period.
The guest room has a carpet with a table and chairs rather than the Japanese style tatami mattress, and its ceiling is decorated with craftwork called “sensai” which is made with colored threads and silk. Above the stairway is a luxurious and rare Czech glass chandelier. The handles of the sliding doors of the butsuma room are made of turquoise colored Shippou-yaki or Cloisonné ware.
     The house is filled with a harmonious blend of Western and Japanese styles and visitors can enjoy the quintessence of the Mitsui family’s opulent life-style from the Edo, Meiji and Showa periods.