There were poems in "Manyoshu" (Collection of Ten Thousand Leaves) (written as 万葉集 or 萬葉集), 'Souls reside within words of the Yamato nation (Japan) of Shikishima (another name for Japan), and it will be filled with good luck due to the power they contain' ('志貴嶋 倭國者 事霊之 所佐國叙 真福在与具') by Kakinomoto no Hitomaro 3254 and '... and as told since the time of gods, the solemn souls reside in words of this country even in the eyes of the gods, and the nation will be filled with well-being from that power so the current population should use words while being wary of this fact...' ('... 虚見通 倭國者 皇神能 伊都久志吉國 言霊能 佐吉播布國等 加多利継 伊比都賀比計理..'.) by YAMANOUE no Okura 894.
『万葉集』（『萬葉集』）に「志貴島の日本（やまと）の国は事靈の佑（さき）はふ國ぞ福（さき）くありとぞ」（「志貴嶋倭國者事霊之所佐國叙真福在与具」-柿本人麻呂3254）「…そらみつ大和の國は皇神（すめかみ）の嚴くしき國言靈の幸ふ國と語り繼ぎ言ひ繼がひけり…」（「…虚見通倭國者皇神能伊都久志吉國言霊能佐吉播布國等加多利継伊比都賀比計理…」-山上憶良894）との歌がある。