As the number of Korean immigrants in the United States have been decreasing, the Korean immigrant churches have also been diminishing. Even prominent Korean churches, like Promise Church in New York City, known for its tradition and scale, has not escaped this crisis. After much contemplation and prayer for the future of the church, Promise Church decided that, although it would require a significant amount of time, it would depart from its traditional Korean-focused immigrant church model in order to become a multicultural church. This decision was not solely based on sociological or demographical reasons but ultimately rooted in theological considerations. In order for Promise Church to transition from its existing Korean-centric homogeneous church model to a multicultural church, this thesis proposes the Eshel Bridge Project, which is currently being implemented within Promise Church. Promise Church plays a pivotal role in the 4/14 Window Movement, with its primary focus and ministry centered around this movement. While engaging in the 4/14 Window Movement, Promise Church has various institutions for children's ministry. These institutions serve children from diverse racial, cultural, and national backgrounds who may not know Jesus. If these children from diverse backgrounds become part of Promise Church's Sunday School, which is primarily Korean, Promise Sunday School will naturally transform into a multicultural Sunday School. As these children grow into adults, Promise Church will organically develop into a multicultural church. The term “islands” is used to refer to the institutions within Promise Church dedicated to children, and “continent” is used to describe the Sunday School. The ministry project that connects the children from these diverse islands to the continent is the Eshel Bridge Project. This thesis outlines and proposes a concrete plan for the execution of this project, referred to as the Eshel Bridge Startup Canvas.