Tatami Core Engineering

The Core: Crafting the Foundation

"What lies beneath matters just as much as what you see."

I. 5-Layer Hybrid Core

Our standard core

5-Layer Structure & Cushioning

Comfort & Daily Practicality

Our standard core combines several materials for a good balance of firmness and comfort. It suits most homes.

Strategic Layers: Wood fiberboard, high-performance insulation foam, and non-woven cushion.
Gentle Touch: Soft yet firm underfoot feel.
Daily Handling: Lightweight for easy maintenance.

Floor Heating Compatible

For Heated Floors

A core designed for floor heating: it lets heat through well and stands up to warmth over the long term.

High Heat Resistance: Built to withstand prolonged thermal exposure without warping or degradation.
Tested in use: used in busy public buildings in Japan.
Optimal Efficiency: Facilitates even heat distribution for consistent indoor comfort.

II. All Wood Fiberboard

Firm and stable

Structural Stability

Solid Core Integration

Constructed purely from compressed wood fiberboard without synthetic foam additives.

Solid Feeling: Firm, grounded response underfoot.
Flat Profile: does not warp and stays flat.

Longevity & Commercial Use

Acoustic Insulation

High-density wood fiberboards act as excellent natural sound buffers.

Sound Barrier: Ideal for multi-story hotel rooms and lounges.
Heavy Foot Traffic: stands up well to heavy use.

III. Zetron All-Foam Core

For humid climates

Unaffected by Moisture

Extreme Environments

A foam core that does not absorb moisture, made for very humid or changing climates.

Humidity: copes well with tropical damp and sea air.
Ultra Lightweight: Up to 50% lighter than standard cores.

Stable in Shape

No Warping

Developed to stay flat even in very humid rooms.

No Warping: keeps its size and shape in demanding conditions.
Special Use: Best for high-humidity spa areas and yachts.

IV. Traditional Rice Straw Core

The original tatami core

Traditional Rice Straw (Wara-toko)

The Original Craftsmanship

Made from many layers of dried rice straw, compressed and stitched, this is the traditional core of Japanese houses.

Natural Breathability: absorbs and releases moisture very well.
Heavyweight Quality: Provides a unique, solid impact-absorbing feel and rich aroma.
Eco-Friendly: 100% natural material that matures beautifully over decades.

Technical Matrix Summary

Precision Craftsmanship

Regardless of the core choice, every mat is accurately hand-measured and finished using professional cutting machinery in our Tokyo workshop within a 1mm tolerance.

"Traditional craftsmanship meets precision performance engineering."