It seems that the next generation energy saving level will exceed 10% of that of existing homes.

I read Professor Mae's serial article in the latest issue of Nikkei Architecture. The serial article was the final installment of the series, and it was neatly summarized, so it's a must-read.

The graph shows that the next-generation ratio has doubled from 5% to 2%. This is based on a 10 estimate by the Ministry of Land, Infrastructure, Transport and Tourism.

Even so, 92% still fall under the 22 standard level, 80% under the 36 standard level, and 32% are uninsulated. About a year ago, I ran an Excel simulation to see how this ratio would change up until about 1. I think the data trends are close to those from that time. I wanted to look at it again, but unfortunately, I couldn't find the file.

In addition to the graph, the breakdown of the 2018 new housing units built in fiscal 95 was also included.

Custom-built detached houses: 28 units

14.5 pre-built houses

12 condominium units

39.9 rental units

It was a very easy-to-understand description. From this, we can see that there are 43.3 detached houses. There are 55.3 people who purchase new houses. Of these, 52% are building custom detached houses, 26% are purchasing ready-built houses, and 20% are purchasing condominiums.

I realized that newly built custom homes are still very much alive today.