Isamu Akamatsu (赤松勇, Akamatsu Isamu) is a supporting character in Hajime no Ippo.
Akamatsu Isamu is a close friend with Kizakura Hiroshi, they both joined Kamogawa Boxing Gym after Aoki's first title match. Making him not to retire. These three together make the "Aoki Team" with their leader, Aoki Masaru. He is also an early boxer, along Kizakura.
His surname is Akamatsu. In Japan, surnames are listed before given names.
Akamatsu and his friend, Kizakura, joined the Kamogawa gym at the same time and are fans of Aoki. He is an early boxer and helps Aoki at the Chūka Soba, with his friend, Kizakura.
He currently helps out in the restaurant alongside his pal Kizakura Hiroshi for Aoki.
Akamatsu appears really tall and thin. He has black hair in a short afro hair style with a prominent hairline. His ears are long, eye color is black, large eyebrows, and always has wrinkles on his forehead.
Akamatsu is seen wearing a red and purple striped long sleeve shirt and long black pants.