Reference

Shunsuke Nakamura considered leaving Reggina due to multiple factors. According to the available information, Reggina's struggles during his stay and a revolving door of managers contributed to an unstable environment. Additionally, injuries and the search for new challenges after spending several seasons with Reggina influenced his decision to explore opportunities with other clubs (Main Stand, Vanity Fair).

Furthermore, European clubs such as Leeds United, Lazio, and Parma showed interest in Nakamura, which likely encouraged him to consider moving to a different competitive environment (Wikipedia).