"I figure no matter how old you are, it's always going to be your first marriage and no life experience is going to make you a better judge of who you should marry"

In this quote, Utada Hikaru is expressing the idea that no matter how much life experience one might have, when it comes to marital relationship, it will constantly seem like their very first time. This is due to the fact that marriage is a distinct and individual experience that can not be fully understood or predicted by anybody else. Despite having actually gone through different life experiences, one's ability to select the best partner for marriage is not always improved. This is because marriage is a complex and ever-evolving relationship that needs consistent effort and understanding. Eventually, Utada Hikaru is stressing the significance of being true to oneself and following one's heart when it concerns choosing a life partner.