Isogai

• Hajime Isogai, Japanese judoka
• Hiromitsu Isogai, Japanese footballer
• Rensuke Isogai, Japanese general
• Simon Isogai, Japanese singer and musician
• Yorihide Isogai, Japanese sport wrestler

  Fictional characters

• List of Assassination Classroom characters#Class 3-E, a character in the manga series Assassination Classroom