:Naoki Miyanishi

{{short description|Japanese baseball player}}

{{Expand Japanese|topic=bio|宮西尚生|date=June 2009}}

{{Infobox baseball biography

| name = Naoki Miyanishi

| image = Fs Naoki Miyanishi 20211007.jpg

| image_size = 250px

| team = Hokkaido Nippon Ham Fighters

| number = 25

| position = Pitcher

| birth_date = {{birth date and age|1985|06|02}}

| birth_place = Nishinomiya, Japan[http://nagoya.nikkansports.com/baseball/professional/dragons/p-nd-tp0-20071119-284832.html Feature article] at Nikkan Sports {{in lang|ja}}

| bats = Left

| throws = Left

| debutleague = NPB

| debutdate = March 25

| debutyear = 2008

| debutteam = Hokkaido Nippon-Ham Fighters

| finalleague = NPB

| finaldate =

| finalyear =

| finalteam =

| statyear = 2024 season

| statleague = NPB

| stat1label = Win–loss record

| stat1value = 37–41

| stat2label = Earned run average

| stat2value = 2.49

| stat3label = Strikeouts

| stat3value = 670

| stat4label = Holds

| stat4value = 412

| stat5label = Saves

| stat5value = 13

| teams =

• Hokkaido Nippon-Ham Fighters ({{npby|2008}}–present)

| highlights =

|awards=

• 3× NPB All-Star (2015, 2018, 2019)
• 3× Pacific League Most Valuable Setup Pitcher (2016, 2018, 2019)

|medaltemplates=

{{MedalCountry | {{JPN}} }}

{{MedalSport | Men's Baseball}}

{{MedalCompetition|Asian Games}}

{{MedalSilver | 2006 Doha | Team }}

}}

{{nihongo|Naoki Miyanishi|宮西 尚生|Miyanishi Naoki|born June 2, 1985 in Nishinomiya, Japan}} is a Japanese professional baseball pitcher for the Hokkaido Nippon-Ham Fighters of Nippon Professional Baseball (NPB).