'''Issei''' or '''Issey''' is a masculine Japanese given name. Notable people with the name include:
*{{Nihongo|Issei Endō|遠藤 一星||born 1989}}, Japanese baseball player *{{Nihongo|Issei Futamata|二又 一成||born 1955}}, Japanese actor, voice actor and narrator *{{Nihongo|Issei Kato|加藤 壱盛|4=born May 28, 2003}}, Japanese association football player *{{Nihongo|Issei Kitagawa|北川 一成||born 1942}}, Japanese politician *{{Nihongo|Issei Koga|古賀 一成||born 1947}}, Japanese politician *{{Nihongo|Issei Mamehara|豆原 一成||born 2002}}, Japanese singer and actor, member of JO1 *{{Nihongo|Issey Miyake|三宅 一生||1938–2022}}, Japanese fashion designer *{{Nihongo|Issei Miyazaki|宮崎 一成||born 1971}}, Japanese voice actor *{{Nihongo|Issei Nishikawa|西川 一誠||born 1945}}, Japanese politician *{{Nihongo|Issei Noro|野呂 一生||born 1957}}, Japanese jazz fusion guitarist *{{Nihongo|Issey Ogata|イッセー尾形||born 1952}}, Japanese actor and comedian *{{Nihongo|Issei Otake|大竹 壱青||born 1995}}, Japanese volleyball player *{{Nihongo|Issei Sagawa|佐川 一政||1949–2022}}, Japanese criminal *{{Nihongo|Issei Suda|須田 一政||1940–2019}}, Japanese photographer * {{Nihongo|Issei Taito|問田一誠||; born 1999}}, Japanese YouTuber *{{Nihongo|Issei Tajima|田島 一成||born 1940}}, Japanese politician *{{Nihongo|Issei Takazaki|髙﨑 一生||born 1987}}, Japanese shogi player *{{Nihongo|Issei Tanaka|田仲 一成||1932/1933–2025}}, Japanese writer *{{Nihongo|Issei Yamamoto|山本 一清||1889–1959}}, Japanese astronomer
== Fictional character == * Issei Hyodo (兵藤一誠), a character from the light novel series ''High School DxD'' * Issei Matsukawa (松川 一静), a character from the manga and anime ''Haikyu!!'' with the position of middle blocker from Aoba Johsai High {{given name}}
Category:Japanese masculine given names Category:Masculine given names