an anthology of one hundred poems by one hundred poets, one poet for each poem

short for 小倉百人一首 (Ogura Hyakunin Isshu): a famous "one hundred poems anthology", used as the basis of certain card games

the famous of the “one hundred poems by one hundred poets” anthologies, compiled by Fujiwara no Teika in c. 1235, used in the basis of certain card games

difficult / hard, probably impossible

to recall, to remember / to learn / to memorize / to feel (an emotion or sense)

to remember, to recognize, to look familiar

"sleeping in the springtime, unaware of dawn": referring to sleeping in late on a comfortable spring day