In March 2025, GreenFaith Japan launched a one-year fellowship program to develop leadership skills on climate change issues among young leaders from various faith groups in Japan, and two representatives from Soka Gakkai joined the program. The fellowship includes more than 10 young people from six faith traditions, including Buddhism, Christianity, Shintoism and new religious movements.

Monthly online lectures with guest experts and activists are organized by GreenFaith Japan, in collaboration with SGI, to provide information on the climate crisis and the role of civil society. Through this network, young faith leaders are expected to deepen friendships, understand the ethical teachings of various religions related to the environment and develop leadership skills in this field. 

On 29 March 2025, the program's opening session was held in person in Tokyo. In his opening remarks, Fletcher Harper, Executive Director of GreenFaith, shared his grave concerns on the climate crisis and his aspiration to work together with the participants to tackle climate issues.

Aiko Nakagaki, a staff member of a Japanese network called “RE Action Council,” presented at the first online study session in April. The council brings together various organizations, including small and medium-sized enterprises, local government and educational and medical institutions that are working toward achieving 100% renewable energy for electricity consumption. Member organizations set a target year and report annually on their energy consumption and renewable energy rate. At the study session, Soka Gakkai, which joined the network in 2020, shared with participants its own efforts to switch to renewable energy sources and the challenges of achieving the goal in its work spaces across Japan.

Masahiro Yokoyama of the Soka Gakkai Office of Peace and Global Issues commented, “There are few opportunities for interfaith cooperation on action to tackle climate change in Japan, so I am glad to connect with other youth of faith.” He also stated that he hopes to build on this experience to produce statements or take concrete action together. 

In addition to the monthly online lectures, the program will implement field research so that participants can promote environmental action within their respective organizations.