the tales of ise
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As the only two known active volcanoes at that time, Mount Fuji and Mount Asama were often employed in love poetry to express burning passion.
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its acrostic or hidden word (mono no na no uta) in which each line starts with a syllable (ka-ki-tsu-ba-ta) that spells out ‘iris’.
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There are many similar instances in both Chinese and Japanese literature of songs or poems being written upon departure on a wall, pillar or other such surface within a house.

