According to a recent study conducted by Yuji SEKI, an author of historical novels, the fact that most of the ancient documents frequently mention Urashima particularly means that it can be interpreted that he was a significant, if shadowy, figure.
歴史作家・関裕二の最近の研究によると古代文書のことごとくが浦島に饒舌なのはこの人物の背後に歴史の闇の存在が指摘できるからであるという。