Ball for ball game and method of manufacturing the same

A ball for a ball game, the ball being a spherical body and comprising:

• a spherical core inside the spherical body, the spherical core being a sphere having a center of the spherical body as a center,
• a spherical cover layer covering the spherical core, the spherical cover layer being a sphere having a center of the spherical body as a center,
• first and second regions formed on a spherical surface of the spherical core or on a spherical surface of the spherical cover layer;
• the first regions are formed of a first material, the first material being an electrically conductive material and having a radio wave reflectance, the first regions each having a diameter of not less than 2 mm and not more than 15 mm, and
• the second regions are formed of a second material in areas other than where the first regions are formed, the second material being an electrically non-conductive material and having a radio wave reflectance lower than the radio wave reflectance of the first material.