ATAMI YOWADO (熱海陽和洞), Koyata Iwasaki Memorial Museum, was a
second house of Koyata Iwasaki (岩崎小彌太), the fourth and last
president of the Old Mitsubishi Organization , located in Atami ,
On April 1978, member companies of the Mitsubishi Kinyokai , core 29 companies of Mitsubishi Group, inaugurated "Management committee of Atami Yowado" (熱海陽和洞管理委員会). Atami Yowado is exclusively opened for members of the committee.