Kazuko Hosoki

was a Japanese fortune teller and writer. She was an author of over 100 books. In addition to her regular celebrity appearances on Japanese television, she was known for her belief that ancestor worship is central to Japanese identity.

Hosoki was associated with Six-Star Divination, known in Japanese as Rokusei Senjutsu. Religious studies scholar Yoshihide Sakurai wrote that Hosoki published on the system in the early 1980s and "quickly set off a fortune-telling boom". Guinness World Records lists Hosoki as having written 81 fortune-telling books totaling 34 million copies sold. Netflix's media materials for the 2026 drama Straight to Hell also describe Hosoki as famous for Six-Star Divination.

Biography Hosoki began managing Tokyo clubs and coffee shops while still a teenager, eventually running up debts to Japanese organized crime members. In 1983, she married influential Japanese power broker Masahiro Yasuoka, who died that same year. She was often seen stating her opinions very strongly on Japanese TV shows. Some of her views may be taken as conservative. She had repeatedly made very traditionalist statements on women in the family, stating that a woman's main function should be to support her husband's career.

Death Hosoki died in Tokyo on 8 November 2021, at the age of 83.