Daiki Nishiyama

{{short description|Japanese judoka}}

{{Use dmy dates|date=July 2023}}

{{Infobox judoka

| name = Daiki Nishiyama

| image =

| image_size =

| alt =

| caption =

| nationality = Japanese

| birth_date = {{Birth date and age|1990|11|20|df=y}}

| birth_place =

| height =

| country = {{JPN}}

| weight_class = {{nbnd}}90 kg, {{nbnd}}100 kg

| rank =

| rank_ref =

| dan =

| club =

| worlds_rank = 2

| worlds_year = 2010

| worlds_weight = Men's 90 kg

| worlds_year2 = 2011

| worlds_weight2 = Men's 90 kg

| regionals_type = AS

| regionals_rank = 2

| regionals_year = 2011

| regionals_weight =

| regionals_year2 = 2015

| regionals_weight2 =

| nationals =

| olympics_rank =

| olympics_year =

| olympics_weight =

| show-medals =

| medaltemplates =

{{Medal|Sport| Men's judo }}

{{Medal|Country| {{JPN}} }}

{{Medal|Competition| World Championships }}

{{Medal|S| 2010 Tokyo | {{nbnd}}90 kg }}

{{Medal|S| 2011 Paris | {{nbnd}}90 kg }}

{{Medal|Competition| Asian Championships }}

{{Medal|S| 2011 Abu Dhabi | {{nbnd}}90 kg }}

{{Medal|S| 2015 Kuwait City | {{nbnd}}90 kg }}

{{Medal|Competition| IJF Grand Slam }}

{{Medal|G| 2011 Paris | {{nbnd}}90 kg }}

{{Medal|G| 2016 Paris | {{nbnd}}90 kg }}

{{Medal|S| 2009 Tokyo | {{nbnd}}90 kg }}

{{Medal|S| 2010 Moscow | {{nbnd}}90 kg }}

{{Medal|S| 2011 Moscow | {{nbnd}}90 kg }}

{{Medal|S| 2014 Tokyo | {{nbnd}}90 kg }}

{{Medal|B| 2010 Rio de Janeiro | {{nbnd}}90 kg }}

{{Medal|B| 2013 Tokyo | {{nbnd}}90 kg }}

{{Medal|B| 2015 Tokyo | {{nbnd}}90 kg }}

{{Medal|B| 2016 Tokyo | {{nbnd}}90 kg }}

{{Medal|Competition| IJF Grand Prix }}

{{Medal|G| 2014 Budapest | {{nbnd}}90 kg }}

{{Medal|B| 2014 Düsseldorf | {{nbnd}}90 kg }}

{{Medal|B| 2015 Düsseldorf | {{nbnd}}90 kg }}

{{Medal|B| 2017 Düsseldorf | {{nbnd}}90 kg }}

{{Medal|B| 2018 Hohhot | {{nbnd}}100 kg }}

{{Medal|Competition| World Juniors Championships }}

{{Medal|B| 2009 Paris | {{nbnd}}90 kg }}

| updated = 17 July 2023

}}

{{nihongo|Daiki Nishiyama|西山 大希|Nishiyama Daiki|born 20 November 1990 in Higashihiroshima, Hiroshima }} is a Japanese judoka. He won the silver medal in the middleweight (90 kg) division at the 2010 and 2011 World Judo Championships. Because of Nishiyama's ranking and recent form it has come as even more of a surprise that he was not included in the Japan squad for the 2012 Olympics. The Japanese judo association instead went with the more experienced Masashi Nishiyama in the {{nbnd}}90 kg category.