Possible Clues:

• 31-syllable Japanese poem
• Poem of 31 syllables in five lines
• Japanese poem
• Buried under storage container is a Japanese poem
• Fail badly with a Japanese verse
• Type of Japanese poem
• Hearing in ship some Japanese verse
• Japanese poem of 31 syllables
• Japanese poem of five lines and 31 syllables
• Abode of fish, central element in oceanic poem