The way Tsukasa answered the 100 years question suggests she knows exactly how shitty the period was.
Also:
"Workers leaving the lumiere factory" was released in 1895 and is considered the first true motion picture:
https://en.wikipedia.org/wiki/Workers_Leaving_the_Lumi%C3%A8re_Factory
That would push Tsukasa's birth date to at least 1890.