A Scientist (科学者, Kagaku-sha) in a broad sense is one engaging in a systematic activity to acquire knowledge. They study the natural/physiological world as a profession.

There are Amateur Scientists which can refer either to the ones that study science without having it registered as an official occupation or a novice scientists who either lacks knowledge or has just begun to learn science; this can lead to dire consequences and after effects for their actions if they are not fully understood or experimented without being fully aware of the risks.

In the World of Touhou, as well in Seihou it is rare to find a decent scientist due the fact that most of them are amateurs and caused a lot of troubles.

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