Ongekishin (音撃震, Ongekishin, lit. "Sound Attack Quake") is a device used by String Oni. If used, it should be attached on Ongekigen to turn it into a guitar, just for their Ongeki Finishers. When not in use, it is usually lodged on the buckle part of their Equipment Belt. This type of Ongekishin is used by String Oni who is in the training phase but is able to transform into Oni form. Called as Practice Ongekishin (練習用音撃震, Renshū-yō Ongekishin), it is used by Transformed Todayama, which looks ve