Complex sentence: Although the date of his first visit is not known, he sailed to Japan twice before 1600, and it is recorded that he arrived in Japan on July 31,1585 for his second visit there, on the Portuguese ship "Santa Cruz".
Split into simpler sentences: Although the date of his first visit is not known, he sailed to Japan twice before 1600. It is recorded that he arrived in Japan on July 31,1585 for his second visit there, on the Portuguese ship "Santa Cruz".