Natural stone, Tokyo studio

We quarry-source slabs, cut and finish them in our own workshop, and sit with you on site to choose stone that answers both the drawing and the structure beneath it.

Stone chosen with the eye and the load in mind

Request a sample set

Showroom in Koto City
Open Tuesday to Saturday
Working since 2004

Rows of upright natural stone slabs stored in a lit warehouse yard

One roof, quarry to install

We stand between the quarry and the finished room

Most of the trouble with stone happens in the gaps — between the quarry that cut it, the fabricator who shaped it, and the site where it finally lands. We hold all three.

Sourcing. We buy direct from verified quarries, inspect each block for colour run and fissures, and reject what will not hold up in use.
Fabrication. Our workshop cuts slabs to format, mitres edges and dresses the surface in-house, so dimensions match the drawing exactly.
Consultation. We bring samples to the site, read the light and the wear, and advise on the stone and finish that will actually last there.

Browse by where it goes

Choose stone by its application

Every surface asks a different question of the stone — slip, weight, water, wear. Start from the place, not the pattern.

Underfoot

Flooring

Honed limestone and dense granite for rooms that take traffic. We advise on slip rating and tile format before you commit.

Honed · Flamed · Tumbled

On the wall

Interior cladding

Thin split-face and sawn panels that carry a room without loading the structure. Fixed on concealed rails or adhesive beds.

Split · Sawn · Ledgestone

Work surface

Countertops

Full slabs in granite and quartzite, templated on site and mitred for depth. Sealed for kitchens, left raw for cold pantries.

Polished · Leathered · Mitred

Outdoors

Landscaping paving

Frost-resistant basalt and granite setts for paths, terraces and courtyards. Calibrated thickness for a stable laying bed.

Setts · Slabs · Kerbs

Statement

Feature walls

Book-matched marble panels cut from one block so the veining mirrors across the join. Specified for lobbies and hearths.

Book-match · Veined · Lit

Water & heat

Wet rooms & hearths

Low-absorption granite and treated limestone for bathrooms, pool surrounds and fireplaces where moisture and heat cycle hard.

Sealed · Dense · Tested

Core materials in stock

The stone we keep on the floor

Indicative pricing per square metre for a standard honed finish at 20 mm. Formats, thickness and finish all move the figure — ask for a firm quote.

Metamorphic

Marble

Soft light, clear veining, best kept away from acids. The material of choice for feature walls and low-wear floors.

¥18,400/ m²

Order a sample

Most specified

Igneous

Granite

Hard, dense and near-indifferent to water and heat. Our workhorse for countertops, thresholds and outdoor paving.

¥14,900/ m²

Get a firm quote

Sedimentary

Limestone

Even tone and a calm matte face. Sealed, it reads beautifully on interior floors and shaded terraces.

¥11,200/ m²

Request samples

Volcanic

Basalt

Fine, uniform charcoal grain with excellent frost resistance. Flamed for grip on exterior steps and courtyards.

¥12,600/ m²

Book a sample visit

In figures

What the studio has behind it

4families

Marble, granite, limestone and basalt held in stock
5origins

Carrara, Aji, Jeju, Cotswold and Shirakawa on the floor today
5stages

Consultation to installation, each with a named contact
22years

Trading from the same Koto yard

From drawing to doorstep

How a stone order runs

Five stages, each with a named contact. You never hand off to a stranger between the quarry and the finished install.

01

Consultation

We talk through the room or the site — light, wear, budget and the look you are after. There is no charge for the first conversation.
02

Sample selection

We pull candidate stones and send a sample set. You see the real colour and grain in your own light before deciding anything.
03

Measurement

A fabricator templates the space on site, recording falls, services and awkward returns so the cut pieces fit the first time.
04

Fabrication

The slab is cut, edged and finished in our workshop. Veined stone is laid out and matched by hand before any saw touches it.
05

Installation

We set the stone, seal where needed and hand over care notes. Our fitters work with your builder or landscaper directly.

The surface does the work

Finish changes what stone can do

The same block can read as glass or as grit. The finish decides grip, glare and how dirt holds — so we choose it against the use, not the photograph.

Honed. A soft matte face that hides scratches and reduces glare — our default for interior floors and quiet countertops.
Polished. A mirror surface that pulls the deepest colour and veining out of marble and granite for walls and lobbies.
Flamed. Heat opens the surface into a coarse, slip-resistant grain — the right call for exterior steps and wet paving.
Bush-hammered. A pitted, tactile texture with strong shadow and grip, used on landscape stone and feature plinths.

Craftsman dressing a stone surface in a fabrication workshop

Where the stone comes from

Regions and standards we source to

We buy from quarries we have visited, with documented extraction and traceable blocks. These are the origins on our floor today.

CarraraTuscany, Italy
AjiKagawa, Japan
Jeju BasaltJeju, Korea
CotswoldEngland, UK
ShirakawaGifu, Japan

All suppliers hold traceable extraction records · Blocks inspected on arrival · No reclaimed or re-marked stone

From the trade

“They brought three samples to the apartment, held them against the morning light, and talked us out of the one we had set our hearts on. The floor they steered us to has aged exactly as they said it would. That is the whole value of the consultation — they know what the stone will do in a year.”

Maya Okabe Principal, Okabe + Reel Architects

See it before you buy it

The sample request program

A photograph lies about stone. The sample program puts real cut pieces in your hand so you judge colour, grain and finish in the light they will actually live in.

Tell us the application and we pick up to five candidate stones to match it.
Samples ship free across the 23 wards and most of greater Tokyo.
The sample fee is credited in full against any order over ten square metres.

For the specifier

Technical reference by family

Standard stocked dimensions and typical performance. Custom thicknesses and formats are available on quotation.

Property	Marble	Granite	Limestone	Basalt
Slab thickness	20 / 30 mm	20 / 30 mm	20 mm	20 / 40 mm
Tile formats	300–600 mm	300–600 mm	400–600 mm	100–400 mm
Lead time	3–4 weeks	2–3 weeks	3 weeks	3–5 weeks
Water absorption	0.4 %	0.2 %	1.8 %	0.5 %
Recommended use	Walls, low wear	All surfaces	Floors, shade	Exterior, wet

Before you ask

Common questions

We price per square metre, set by the material, the finish and the thickness. Edging, cut-outs, mitres and delivery are quoted separately once we have your dimensions. The figures in our catalogue are indicative for a standard honed finish at 20 mm.

For stocked tiles there is no minimum. For full-slab fabrication we usually work from one slab upward. Landscaping orders of paving and setts are quoted by the pallet, and we are happy to supply offcuts for small repairs.

The first consultation is free. A full on-site template and measurement visit carries a fee that is credited back when you proceed with fabrication. Visits across Tokyo are usually booked within a week.

Yes. Our workshop cuts to templates and CAD files for countertops, vanities, hearths, thresholds and bespoke cladding. We will advise early if a drawing asks more of the stone than it can structurally give.

We do, and we partner with several renovation and landscaping firms on trade terms. We hold frost-resistant paving, setts and kerbs in stock and can calibrate thickness for a consistent laying bed on large terraces.

Homeowners · Architects · Contractors

Bring the stone to the site

Book an on-site consultation or a sample visit and we will read the space with you before a single slab is cut.

Book a consultation

Come and handle it

Visit the Shinsuna showroom

Full slabs stand on the floor and finished panels line the walls. Drop in to browse, or call ahead to schedule a measurement.

Showroom3-5-18 Shinsuna, Koto City, Tokyo 136-0075, Japan
Telephone+81 3-5632-8147
Opening hoursTuesday to Saturday, 10:00 – 18:00. Closed Sunday and Monday.