A poem supposedly created by Wani introduced in Kokin Wakashu Kanajo is not included in Hyakunin Isshu (one hundred waka poems by one hundred poets) but is designated as a joka to be read at the beginning of a karuta card competition held by the All-Japan Karuta Association.
古今和歌集の仮名序に見る王仁の作とされるこの歌は百人一首には含まれてはいないが、全日本かるた協会が競技かるたの際の序歌に指定しており、大会の時に一首目に読まれる歌である。