Meanings

the Double Tenth

Southern Cross (asterism formed with the brightest four stars of the constellation Crux)

24 solar stems (terms used to denote the changing of the seasons)

many-fold

around-the-clock system

radish (Raphanus sativus var. sativus)

twentieth century

210th day (from the first day of spring according to the lunar calendar)

220th day

age eighty

insufficient

64th note

age sixty

66-odd provinces of old Japan

the 48 basic techniques

ten great disciples (e.g. of Basho, Confucius, etc.)

age seventy

ten times

one's favourite party trick (favorite)

age fifty