Complex sentence: Riding in a saddle was reserved for the samurai class, the end of the samurai era in 1868 (Meiji period) allowed non-samurai to openly ride horses and eventually the Japanese adopted the western saddle.
Split into simpler sentences: Riding in a saddle was reserved for the samurai class. The end of the samurai era in 1868 (Meiji period) allowed non-samurai to openly ride horses and eventually the Japanese adopted the western saddle.