Koichi Sekimoto

{{short description|Japanese footballer}}

{{Infobox football biography

|name=Koichi Sekimoto
関本 恒一

|image=

|image_size=

|caption=

|fullname=Koichi Sekimoto

|birth_date={{Birth date|1978|5|23}}

|birth_place=Osaka, Japan

|death_date={{Death date and age|2016|1|23|1978|5|23}}

|death_place=Osaka, Japan

|height={{Height|m=1.77}}

|position=Defender

|currentclub=

|clubnumber=

|youthyears1=1994–1996|youthclubs1=Yokkaichi Chuo Technical High School

|years1=1997–2002|clubs1=Sagan Tosu|caps1=89|goals1=2

|years2=2013–2014|clubs2=FC Ise-Shima|caps2=5|goals2=1

|totalcaps=94|totalgoals=3

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

|manageryears1=|managerclubs1=

|medaltemplates=

}}

{{Nihongo|Koichi Sekimoto|関本 恒一|Sekimoto Koichi|May 23, 1978 – January 23, 2016}} was a Japanese football player.