Sentence:  When he had given the call a few moments thought , he went into the kitchen to ask Mrs. Yamata to prepare tea and <WSD>sushi</WSD> for the visitors , using the formal English china and the silver tea service which had been donated to the mission , then he went outside to inspect the grounds . 
Meaning of the word marked with <WSD> tags:  rice (with raw fish) wrapped in seaweed