It seems that "Nacimiento"[1] together with "El viejo y la niña" placed in front of the Izu Chōhachi Art Museum were the result of a meeting by Osamu Ishiyama, the architect of the museum and Casa Estrelita, with Etsuro Sotoo, Chief Sculptor of Sagrada Familia, when Ishiyama was travelling in Spain.
1. https://www.town.matsuzaki.shizuoka.jp/docs/2024032500022/