Kagoshima 1st District (鹿児島県第1区, Kagoshima-ken dai-i-ku) is a single-member electoral district of the House of Representatives the lower house of the Diet of Japan.

From the first elections in 1996 until 2009, the Representative was Okiharu Yasuoka who was first elected to the Diet in 1972 and was for a long time a Representative for an electoral district that covered the Amami Islands.

In the DPJ victory in the 2009 elections the district was won by democrat Hiroshi Kawauchi, but Yasuoka won the district back in 2012.

In 2021 Hirotake Yasuoka was put on a safe spot in the Kyushu proportional representation block, where he gained a seat in the Diet, and was replaced by Takuma Miyaji as the LDP candidate.

Miyaji is the son of Kazuaki Miyaji, former Representative of the Kagoshima 3rd district and had first gained seat in the Diet in 2017 in the Kyushu PR block.