Columbia subject headings:
Astronomy--Japan--History--17th century.
Astronomy--Japan--History--18th century.
Astronomy--Japan--History--19th century.
Calendar, Japanese--History--17th century.
Calendar, Japanese--History--18th century.
Calendar, Japanese--History--19th century.
Cosmology, Japanese.
Harvard subject headings:
Astronomy--Japan--History.
Calendar, Japanese.
Cosmology.
Princeton subject headings:
Astronomy--Japan--History.
Calendar, Japanese.
Cosmology.