This is an example of installing insulation in a Japanese-style room on the second floor.
The Japanese-style room on the second floor is hot, so we installed insulation in the ceiling.
We often hear that in older homes, there is no insulation in the attic, so it is impossible to stay on the second floor in summer.
This is especially true in recent years, when it has become much hotter than it used to be.
This time, we removed the entire ceiling of the Japanese-style room, created a base, installed insulation, put up boards, and finished it off with wallpaper.