I see.

A dam can hold up water, can store water.

And there's also the use of the dam to generate hydroelectric power.

Gensokyo has never had a history of floods, nor has it ever had a shortage of water.

It has always been planning to build a nuclear reactor, yet now, they want hydroelectric power, this does not make any sense.

Hold up and store water? This is just too weird...

Hold up and store water? This is just too weird...

*pauses*

The previous dam's formation and total disappearance in one night, there's so much uncertainty...