noun
foam soap
Refers to soap that dispenses as foam, often from a pump bottle. Common in households and public restrooms.
泡石鹸は手を洗うのに便利です。
Foam soap is convenient for washing hands.
この泡石鹸は泡立ちが良くて気に入っています。
I like this foam soap because it lathers well.
Compound of 泡 (awa, 'foam') + 石鹸 (sekken, 'soap'), with rendaku voicing of せっけん to ぜっけん.