Arti Kata 八十神

all the gods and goddesses

the eight gods who preside over the lucky/unlucky directions of the traditional calendar for each year (in Onmyōdō)

age eighty

the thirty guardian deities (one for each day of the lunar month)

88 temples (of, or modeled after those of, Shikoku)

many islands

Around the World in Eighty Days (1873 novel by Jules Verne)

(one's) 80s

eighty-eighth day from the beginning of spring

you're never too old to learn

Meiji 27-28 Campaign (alternate name for the First Sino-Japanese war; 1894-1895)

twenty-eight mansions of Chinese astronomy (constellations dividing the ecliptic into 28 positions)