iPPon seoi nage is a popular judo throw that involves using an opponent's momentum to execute a shoulder throw. The technique begins with the judoka gripping their opponent's gi and positioning themselves to one side. By pulling the opponent forward while simultaneously turning their back, the judoka can lift and throw them over their shoulder. This throw is effective in both competition and self-defense, as it allows for quick execution and can be performed against various opponents. Mastery of ippon seoi nage requires practice and understanding of balance, timing, and leverage to ensure a successful throw.