At some time or other, it became an accepted theory that Ota died on Kozu-shima Island, and the memorial service for Ota has since then been annually held in May by Christians, many of them coming from Korea as well as from Japan, which contributes to the island's tourist industry.
いつしかおたあは神津島で死んだことになり、以来同島では毎年5月に、日韓のクリスチャンを中心として、おたあの慰霊祭が行なわれ観光資源となっている。