Treefrog

Treefrog is a Japanese automotive fragrance brand whose product is manufactured and packaged in Japan by Sakura. The brand is best known for the Xtreme Fresh series — a water-based gel-cup passive diffuser in a thin upright container, designed to sit under a seat or in a door pocket — and for the "Black Squash" scent, a sweet fruity-citrus fragrance that became a JDM staple in the 2010s.

The brand has no public English-language SDS library and no resolving manufacturer website in the US market. Distribution in the US is handled by third-party Amazon sellers; the original Japanese product page is the authoritative source for label-side information, but it is not indexed in English. Variants exist in 1-pack, 2-pack, 3-pack, and an XL 400g format ("Fresh Box XL"), and in scent options including Black Squash, White Peach, Marine, and New Car.

Treefrog is a separate brand from Air Spencer (Eikosha) — the two are frequently confused because both are Japanese gel-format air fresheners that include a "Squash" scent option, but the manufacturers, container designs, and refill systems are distinct.