Kokuyo Duora vs Herman Miller Cosm High Back

Side by side from official specifications, sourced prices and User Insights. No written comparison exists for this pair yet.

Kokuyo

Kokuyo Duora

¥83,710 – ¥127,930

≈ $530 – $820

Herman Miller

Herman Miller Cosm High Back

$1,925 – $2,400

3 in

more seat-height adjustment on Herman Miller Cosm High Back than Kokuyo Duora (official specs)

Differences at a glance

Kokuyo DuoraHerman Miller Cosm High Back

Price: ¥83,710 – ¥127,930$1,925 – $2,400
Seat height: 420–510 mm (16.5–20.1 in)14.8–21.4 in (37.6–54.4 cm)
Seat depth: 405–455 mm (15.9–17.9 in)15.9 in (40.4 cm)
Arms: 2-way motion arms (height stroke 100 mm, depth stroke 65 mm, angle 30° inward)Leaf Arms; Height-Adjustable Arms; Fixed Arms; No Arms; Arm Height: 7.3–11.7"
Warranty: Structure 10 years from delivery (purchases from Jan 2023; back frame, arm frame, base legs); mechanisms and moving parts 2 years; exterior and surface finish 1 year12-year, 3-shift warranty, with limited exceptions

What do owners mention most?

Back support for the Kokuyo Duora, and comfort for the Herman Miller Cosm High Back, based on review summaries.