To build a castle in one night is preposterous, but Yoshiharu knows it’s the next move to make.  But convincing Nobuna will take longer.
Constructing a castle 
like this is impossible.
So eine Burg zu bauen, ist aussichtslos!
Construir un castillo de 
esta forma es imposible.
Construir un castillo de 
esta forma es imposible.
Il est impossible de construire
 un château dans ces conditions.
Construir um castelo assim é impossível.