Solution to Even the Blossoming Flowers...

The title of the puzzle is the first line of the famous Japanese poem, Iroha. It contains all but one kana, or syllabic Japanese script, once; for this reason, it is frequently used as an ordering of kana before the Gojūon ordering system became popular. The Gojūon (literally, "50 sounds") is a table of the Japanese syllables, roughly indexed by transliteration sound, i.e., the 10 row indices are consonant sounds, and 5 column indices are vowel sounds.

Here is Iroha written in hiragana, one of the three kana:

いろはにほへと
ちりぬるを
わかよたれそ
つねならむ
うゐのおくやま
けふこえて
あさきゆめみし
ゑひもせす

Here is the Gojūon written in hiragana (image courtesy of en.wikipedia.org):

While reading about the Gojūon, one notices the chart is 10 rows by 5 columns, oddly similar to the given chart of letters. Overlaying the Gojūon on the chart gives a mapping between kana and letters. Then one sequentially indexes the 47 hiragana from the poem into the chart to get the string PLURALOFWORDTHATFOLLOWSSHRINKGIFTSANDWICHORBODY, whose answer is WRAPS.