The beam splitter and three signal recycling mirrors of KAGRA are suspended from Type B suspensions. They incorporate an inverted pendulum vibration isolation table and multiple levels of suspended masses with blade springs for additional horizontal and vertical vibration isolation. The status of the characterization and
commissioning of the SR
suspensions of KAGRA is described. Also including some urgent problems to be solved.
5th KIW. Perugia, Italy 14.02.2019