Mina Watanabe (渡邉 美奈, Watanabe Mina, born 16 September 1985 in Mito, Ibaraki) is a Japanese judoka.

Watanabe is from Mito, Ibaraki.

After graduation from high school, she worked for Komatsu Limited.

Watanabe won the bronze medal in the Middleweight (70 kg) division at the 2009 World Judo Championships.