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Pulsed power generators using an inductive energy storage system are extremely compact and lightweight in comparison with those using a capacitive energy storage system. A reliable opening switch operated repetitively is necessary to realize an inductive pulsed power generator. Two kinds of repetitively operated opening switches have been developed in Kumamoto University. One is an exploding copper wire set by an automatic wire setting device, and the other is a plasma opening switch using YAG laser-produced plasma. Both switches are described.