Scythe Japan has launched the Kotetsu Mark 4 (model SCKTT-4000), its latest budget air cooler designed as a follow-up to the popular Kotetsu Mark 3. The new model keeps the familiar single-tower layout with four 6 mm nickel-plated heatpipes, now paired with the Wonder Tornado 120 mm PWM fan, a change from the KAZE FLEX II 120 PWM from Mark 3. The cooler measures 134 × 155 × 80 mm (vs 138 x 154 x 80 mm in Mark 3) with the fan attached and weighs 771 g. The 120 mm fan operates from 350 ±200 RPM up to 2000 RPM, pushing up to 60.29 CFM with noise levels rated between 3.0 and 28.88 dBA. Static pressure is listed at 0.05-2.45 mmH₂O, which should be enough for mainstream CPUs in compact or mid-tower builds. Another change is the restyled top cover adding a bit of attention to details.

Kotetsu Mark 4 is compatible with Intel LGA 1851, 1700, 1200, and 115X and AMD AM4 / AM5 platforms. Scythe includes a single year of warranty. In Japan, the Kotetsu Mark 4 is priced at ¥3,480, roughly $22, an entry-level product for users looking for a quiet, no-fuss CPU air cooler. It's worth noting that Scythe unfortunately shut down its European branch this April, meaning customers in the region now have to rely on European distributors and online retailers. Before the Kotetsu Mark 4, Scythe also introduced the Mugen 6 Dual Fan White Edition in September, a premium variant of the Mugen 6 series that originally debuted earlier this February.