Main components used at JSNS (Japan Spallation Neutron Source) have been installed at MLF (Materials and Life science experimental Facility) in J-PARC, which will be capable to reach the highest intensity of pulse neutron beam in the world. Commissioning tests are carried out to accept proton beam at JSNS in May 2008. The issues for future of JSNS are described to increase beam power and prolong the lifetime of each component.