20 years old; (arch.) twenty
twentieth day of the month; twenty days
house mouse (Mus musculus)
radish (Raphanus sativus var. sativus)
220th day; end of the storm period
twentieth day of the first month (end of New Year celebrations, upon which remaining New Year's food is eaten, decorations are stowed away, etc.)
pika (rabbit-like animal of family Ochotonidae)