72 out of 100 Good
The mineral half of Japan's great value brand, and a clay engineered with the same quiet care as everything Iris Ohyama makes. Where the company's paper litter leads on conscience, its bentonite leads on consistency, and it arrives at No. 37 with seventy two on a card of perfectly even fours.
Dust, clumping, odour and tracking each score a solid four. The natural bentonite clumps firmly, adsorbs odour as it sets, pours with the low haze the brand engineers into its grain, and stays largely in the tray, a balanced clay that does every important thing well and nothing badly. For a value litter, the absence of a weak performance axis is its own kind of achievement, and it explains the brand's perennial bestseller status at home.
Sustainability, as for every clay, is the anchor, scored at two. This is mined bentonite, neither renewable nor biodegradable, and the conscience mark reflects it plainly. It is the single reason a litter this consistent sits in the middle of the list.
What you are buying is dependable, low dust Japanese clay from a maker that sweats the details, the mineral choice for the owner who wants Iris Ohyama reliability without the disposables of a sheet system. It will not satisfy the environmentally minded, and it does not reach for a headline number, but it is a tidy, even, well built bentonite at a fair price. For a no surprises everyday clay from a trusted name, it is a sound and sensible answer. A model of unglamorous competence, which is exactly what a value clay should be.