context: In addition to his own books and articles during this period, he also joined Inazo Nitobe in crafting what became his most well-known book, Bushido: The Soul of Japan.
source: The prolific writer was also a prolific traveller, making eleven trips to Europe--primarily to visit the Netherlands.
reference_original: El prolífico escritor también era un prolífico viajero, visitó Europa once veces, sobre todo para viajar a los Países Bajos.
reference_flipped: La prolífica escritora también era una prolífica viajera, visitó Europa once veces, sobre todo para viajar a los Países Bajos.