Tatsuomi Koishi

{{short description|Japanese footballer}}

{{Infobox football biography

|name=Tatsuomi Koishi
小石 龍臣

|image=

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|caption=

|fullname=Tatsuomi Koishi

|birth_date={{Birth date and age|1977|8|22}}

|birth_place=Tosu, Saga, Japan

|death_date=

|death_place=

|height={{Height|m=1.64}}

|position=Midfielder, Forward

|currentclub=

|clubnumber=

|youthyears1=1993–1995|youthclubs1=Higashi Fukuoka High School

|youthyears2=1996–1999|youthclubs2=Rissho University

|years1=2000–2005|clubs1=Sagan Tosu|caps1=141|goals1=15

|years2=2006|clubs2=ALO's Hokuriku|caps2=16|goals2=3

|totalcaps=157|totalgoals=18

|nationalyears1=|nationalteam1=|nationalcaps1=|nationalgoals1=

|manageryears1=|managerclubs1=

|medaltemplates=

}}

{{Nihongo|Tatsuomi Koishi|小石 龍臣|Koishi Tatsuomi|born August 22, 1977}} is a former Japanese football player.