The purpose of this study is to analyze the brick industry in modern Japan by statistical data. Main results of this study are as follows.
1. The main factor that increased the amount of brick production rapidly in the middle of the Taisho era was increase of private construction investment.
2. In depression after 1920, the construction investment and the amount of cement production increased, but brick decreased. This change proves that brick construction declined at this time.
3. The number of brick factories and laborer increased in the middle of the Taisho era. But the productivity didn't rise remarkably. Also there were many factories that didn't own engine.
4. The small and middle scale brick factories co-existed with large one. And the brick industry was still labor-intensive in the Taisho era.
