When the construction work nearly ended but the sun was about to set, Kiyomori invited the setting sun back, or he refused the opinion that the construction work be started after burying human sacrifice and he made them write kyomon (sutras) of Issai-kyo (Complete Collection of Scriptures) on stones and immersed the stones as bases, which was why the artificial island was called 'Kyogashima Island' and so on.
もう少しで工事完成というそのときに日が暮れそうになったため、清盛が沈む太陽を招き返した、あるいは、人柱を沈めてから工事をしようという意見をしりぞけて、諸人に一切経の経文を書かせた石を沈めて基礎を築いた、そのため、この人工島を「経が島」と称したなどである。