Her main battery consisted of a single 300-pounder () Armstrong rifled muzzle-loading (RML) gun located in the bow turret in a pivot mount. The fixed turret had three or five gun ports. A pair of 70-pounder () Armstrong RML guns were positioned in the oval fixed turret abaft the mainmast, one pivot mount on each broadside firing through two gun ports. The Japanese removed one of the 70-pounder guns and added a pair of Armstrong 6-pounder guns, four 4-pounder field guns and a Gatling gun.