Urgent! How to understand the harmonious house in Japan?

Are you talking about the "harmony room" where the Japanese live? In Japan, houses are divided into "harmony rooms" and "foreign rooms". The so-called "Harmony Room" is a purely Japanese-style room with tatami, small dining table, quilt, etc ... But the "foreign house" is imitation of Western style, with beds, sofas, fireplaces, etc. Most of the apartments that Japanese people live in now are foreign houses. But some Japanese people, such as the elderly, are still not used to it, so one room in the apartment must be a harmony room, that is, a Japanese room.