Possible Clues:

• Mints containing Retsyn
• Tic Tacs alternative
• "Two mints in one" sloganeer, once
• Detective whose first name is Kentaro
• Clorets alternative
• Candy that's 'two mints in one'
• Big name in mints
• Popular breath mints
• "It's two, two, two mints in one"
• After-dinner brand