Koji is more reserved than Kotake. He is very ambitious and wants to be a pro-kicker.
Koji has black, short hair. He has grey eyes and is light-skinned.
He wears his soccer jersey all the time. His shirt is red, blue, yellow and the number on the shirt is a white ten. His shorts are white and blue. He wears red socks and blue-white shoes.
- He is a good friend of Kotake.