:Koji Aoyama

{{short description|Japanese baseball player (born 1983)}}

{{Infobox NPB player

| name = Koji Aoyama

| image = 20120320 Koji Aoyama,pitcher of the Tohoku Rakuten Golden Eagles,at Yokohama Stadium.JPG

| image_size = 250px

| caption = Aoyama with the Tohoku Rakuten Golden Eagles

| position = Pitcher / Coach

| team = Tohoku Rakuten Golden Eagles

| number = 81

| birth_date = {{birth date and age|1983|8|12}}

| birth_place = Hakodate, Hokkaido, Japan

| bats = Right

| throws = Right

| debutleague = NPB

| debutdate = March 25

| debutyear = 2006

| debutteam = Tohoku Rakuten Golden Eagles

| finaldate = September 29

| finalyear = 2020

| finalteam = Tohoku Rakuten Golden Eagles

| finalleague = NPB

| statleague = NPB

| stat1label = Win–loss record

| stat1value = 42-58

| stat2label = ERA

| stat2value = 3.67

| stat3label = Strikeouts

| stat3value = 713

| stat4label =Saves

| stat4value =45

| teams =

;As player

• Tohoku Rakuten Golden Eagles ({{npby|2006}}–{{npby|2020}})

;As coach

• Tohoku Rakuten Golden Eagles ({{npby|2024}}–present)

| awards=

• 2× NPB All-Star (2012–2013)
• 1× Japan Series champion (2013)

}}

Koji Aoyama (青山 浩二, born August 12, 1983) is a Japanese former professional baseball pitcher. He played in Nippon Professional Baseball (NPB) from 2006 to 2020 for the Tohoku Rakuten Golden Eagles.