CAPH (Beta Cassiopeiae). At mid second magnitude (2.27) and just barely the second brightest star in Cassiopeia, almost but not quite as bright as Shedar (the Alpha star), Caph, the Beta star, stole its name from the whole “W” of the constellation.
The Hidden Fortress was released theatrically in Japan on December 28, 1958. The film was the highest-grossing film for Toho in 1958, ranking as the fourth highest-grossing film overall in Japan that year.