日光鉱山（栃木鉱業所日光坑）は栃木県塩谷郡塩谷町にあった鉱山。 昭和初期より金・銀・銅・鉛・亜鉛が採掘された。日本鉱業（株）により経営され1975年閉山。 付近には天頂鉱山（栃木鉱山）もあり、昭和初期に銅を採掘された。主要鉱物は黄銅鉱、黄鉄鉱、希に方鉛鉱、閃亜鉛鉱。 日光鉱山には坑口跡など、天頂鉱山には通洞坑、倒壊した建物などが残る。大規模なコンクリート遺構も見られたが既に解体されたらしい。 紫水晶などが採取されるらしい。
Nikko Mine (Tochigi Mining Plant Nikko Minami) was a mine in Shioya Town, Shioya gun, Tochigi prefecture. Gold, silver, copper, lead, zinc was mined from the early Showa era. It was operated by Japan Mining Co., Ltd. and closed in 1975. There is a zenith mine (Tochigi mine) in the vicinity, and copper was mined in the early Showa period. Major minerals are chalcopyrite, pyrite, rare germanium, zinc blende. In the Nikko mine there are marks of the wellhead, etc., the cave pit and the collapsed building etc. remain in the zenith mine. Large-scale concrete remains were also seen, but it seems that it was already dismantled. It seems that purple crystal etc. are collected.