In Japanese, the phrase "I'm coming" (in a sexual context) would be expressed as: イク (Iku) - This is a casual way of saying "I'm coming," often used in intimate settings. It comes from the verb 行く (iku), which means "to go," but in this context, it has a euphemistic sexual meaning. If you want to be specific and say "I'm about to come" or "I'm cumming" in a more explicit way: イキそう (Iki-sou) - This translates to "I'm about to come." イッちゃう (Icchau) - This is a more colloquial or playful way of saying "I'm coming." These phrases are often used in intimate or private contexts and should be approached with cultural sensitivity.