Why Regular Soap Can't Fix This
After age 40, your skin produces an oil-based compound called 2-nonenal: the source of "aging odor." Because it's oil-based, regular soap and water simply can't break it down. No matter how hard you scrub.
Persimmon tannins are the only natural ingredient proven to chemically neutralize nonenal at the molecular level. That's the science behind every bar of Honoka.
Think of it like trying to wash grease off a pan with just water. You can scrub all day, but the grease will still cling. You need a degreaser. That's what persimmon tannins do to aging odor.