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Japan's JS Asuka has successfully tested an electromagnetic railgun, achieving velocities of 2,000-2,300 m/s for missile defense. The railgun program aims to deploy small-caliber prototypes by 2027 and medium-caliber systems by 2028, enhancing Japan's naval defense capabilities against hypersonic missiles. International collaborations with France and Germany have accelerated development, with a focus on practical engineering solutions to overcome previous program limitations.