Both models suit side sleepers; the difference is how much the surface gives at the shoulder and hip. SORA is approx. 12 cm thick with a 50% premium wool blend, so it compresses more before you reach the firm layer. HIMARI is approx. 10 cm over an approx. 8 cm firm support core, so it holds you higher and flatter. If you are moving from a thick Western mattress, start with SORA; if you already sleep on a firm surface and want stability, HIMARI is the one. Neither has a published pressure measurement, so this is a description of construction, not a test result.
How to choose
- Mostly on your side, and firm surfaces feel too hard: start with SORA 宙.
- You change position through the night and like stable support: HIMARI 日葵 is designed for back and side sleepers who prefer a steadier surface.
- Pillow height: on a shikibuton, as on any bed, side sleepers generally need a pillow that fills the space between the head and the shoulder.
A base that supports the feel
Use either model on a firm, level surface. A soft base underneath does not add comfort; it reduces support.
Comfort is individual
A shikibuton is bedding, not a medical device, and makes no claim to relieve pain. Return rules differ by country and are set out on each country’s Terms page, so compare the specifications carefully before ordering.