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Official-source supplier research

Compare 15 CNC machining suppliers in Japan

Model revision, stock material, critical tolerances, surface finish, heat treatment, inspection, and lot profile drive process choice and cost.

Request quotes on one specificationSee all 15 suppliers
15
suppliers
5
comparison axes
31
official URLs checked
CARGO / SOURCE MAP2026.07.13

CNC machining

01Material
02Machining process
03Tolerance and finish
04Lot profile
05Secondary process and inspection
Official evidence onlyNo sponsored ranking
What the checkmarks mean

Fifteen suppliers per category were selected from official-site research. Every listed supplier has at least three high-confidence, source-linked public claims. Missing facts stay missing; a check means evidence was found, not that availability or fit is guaranteed.

01 / COMPARE

Compare all 15 CNC machining suppliers

A check means the supplier's official source supports that dimension. A dash means we did not fill the gap by inference.

SupplierLocationMaterialMachining processTolerance and finishLot profileSecondary process and inspectionPublic facts
01株式会社由紀精密Kanagawa✓✓✓✓—4
02HILLTOP株式会社Kyoto✓✓—✓✓5
03株式会社山本金属製作所Osaka✓✓✓—✓4
04株式会社ミズノマシナリーToyama✓✓✓——4
05株式会社NCネットワークファクトリーTokyo—✓—✓✓5
06セキダイ工業株式会社Tokyo✓✓✓——5
07株式会社エージェンシーアシストKyoto—✓✓✓✓4
08株式会社入曽精密Saitama✓✓✓—✓5
09株式会社中田製作所Osaka—✓—✓✓4
10ナカヤマ精密株式会社Osaka✓✓———4
11株式会社山岡製作所Kyoto—✓✓✓✓4
12株式会社共進Nagano—✓——✓4
13株式会社スワラクノスNagano✓✓——✓4
14株式会社大野社Hyogo✓✓✓✓—5
15株式会社加藤研磨製作所Tokyo—✓✓—✓4

02 / DECIDE

Five questions that make quotes comparable

Provide a neutral 3D model plus a controlled 2D drawing that marks only critical characteristics. Ask for prototype and repeat-lot pricing separately.

  1. 01

    Material

    Specify exact alloy, stock form, heat lot, certification, and approved substitutions.

  2. 02

    Machining process

    Turning, 3-axis, 5-axis, grinding, and EDM suit different geometry and lot profiles.

  3. 03

    Tolerance and finish

    Do not generalize one showcase tolerance; mark critical dimensions, datums, and surface finish.

  4. 04

    Lot profile

    Separate prototype, initial production, repeat lot, and annual forecast pricing.

  5. 05

    Secondary process and inspection

    Define heat treatment, plating, masking, certificates, first article, and final inspection.

03 / SPECIFY

Build one quote-ready specification

Use the same inputs for every supplier. This prevents a low headline price from hiding a different material, finish, quantity, or delivery condition.

Machining quote readiness

Separate critical tolerances from standard machining

Open the specification builder
  1. 01Part / model revisionRequired for comparison
  2. 02MaterialRequired for comparison
  3. 03Critical tolerance / surface finishRequired for comparison
  4. 04Likely processRequired for comparison
  5. 05Secondary process / inspectionRequired for comparison
  6. 06Order quantity / cadenceRequired for comparison
  7. 07Delivery location / deadlineRequired for comparison

04 / VERIFY

Trace every supplier back to official sources

These links are evidence, not affiliate placements. Supplier names and official pages are shown in research order without paid promotion.

METHODOLOGY / 2026.07.13

How this page was researched

Included

Active official site, known operating location, and at least three high-confidence public facts linked to first-party sources.

Not inferred

Missing prices, capacity, compliance, availability, and delivery terms stay missing. Contactability and private response data are not published.

Corrections

Send the page URL and a supporting official source. We verify changes against primary evidence before updating.

Request a correction →

05 / FAQ

Before you contact suppliers

Is this a supplier ranking?

No. This is an unordered research comparison based on public facts from official supplier sites. A listing is not an endorsement, score, or guarantee of fit.

How were the 15 CNC machining suppliers selected?

We selected active suppliers with an official site, a verified operating location, and at least three high-confidence public claims linked to official sources. Every published URL was rechecked on July 13, 2026.

Are prices, minimum lots, and lead times guaranteed?

No. Public commercial terms can be product-specific or change without notice. Use the checklist to request a current quote on identical specifications and delivery conditions.

How can I request a correction?

Send the supplier name, page URL, and supporting official source through the Sanka contact page. We review corrections against primary sources.

CARGO / NORMALIZED RFQ

One specification. Multiple suppliers. A comparison you can defend.

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