72 out of 100 Good
Nyantomo's eternal rival, and for many the number one name in the Japanese litter aisle. Unicharm's Deo Toilet works on the same principle as its great competitor, large zeolite and silica pellets sitting above an absorbent sheet that locks urine and odour away below, and it arrives at No. 35 with seventy two on a card that mirrors its rival almost exactly.
Dust is flawless, a five, the large pellets pouring clean, and clumping, scored on capture rather than a conventional clump, comes in at a strong four, with tracking matching it as the big grain stays firmly in the tray. The system is designed to hold a week of use with a single sheet, and at its best it is one of the lowest effort ways to keep a box anywhere in the world.
As with Nyantomo, the honest figures are odour and sustainability. Odour is marked at three, strong early but climbing as the sheet saturates across the cycle on this bench, and sustainability at two, the consequence of disposable sheets, a plastic frame and mined pellets. The convenience is real, and so is the waste.
What you are buying is the most established litter system in Japan, a near hands off, immaculately low dust way to manage a tray from the country's dominant pet care brand. It is the choice for the owner who prizes clean air and minimal daily effort above the last word in odour control or conscience. Locked forever in its duel with Kao, it remains a benchmark for the format. A definitive system, and a window into how differently the Japanese market thinks about the litter box.