Ambition
koen
TenkaSubcontract Audit

Turn rising costs into a clear price negotiation.

Help Japanese small suppliers document cost growth and ask their buyer for a fair discussion.

Annual cost increase to negotiateSample: Parts supplier / annual quote
￥3,000,000

JPY 3,000,000 in net annual cost growth supports a price discussion, not a legally recoverable debt.

Who
A small Japanese parts manufacturer preparing an annual quote for its main buyer.
Where money leaks
Wages, materials and electricity rose, but the buyer still expects last year's price.
Market
Japanese small businesses supplying larger buyers.

Try it with a real document

Presets:

How we got the number

Rule Engine
Laborlabor: JPY 18,000,000 -> JPY 19,440,000
JPY 1,440,000 / year
Steel materialsmaterials: JPY 12,000,000 -> JPY 13,200,000
JPY 1,200,000 / year
Electricityenergy: JPY 2,400,000 -> JPY 2,880,000
JPY 480,000 / year
Other overheadother: JPY 3,600,000 -> JPY 3,480,000
JPY -120,000 / year
Labor + energy share of increasesShare of positive line increases; cost decreases offset the net request. JFTC guidance centers on labor and also discusses material and energy costs.
61.5%
Requested unit-price increaseJPY 500 -> JPY 525 per unit, at 120,000 units/year
JPY 25
Negotiation basisGuideline issued Nov 2023, revised Jan 2026. For covered transactions, unilateral pricing without proper consultation is prohibited; no automatic entitlement to this amount.
JFTC guideline / Toriteki Act

JPY 3,000,000 in net annual cost growth supports a price discussion, not a legally recoverable debt.

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ToKansai Equipment KK 御中
Subject取引価格改定のご協議のお願い - Bracket B-12
GistAsk the buyer to discuss a unit-price increase supported by documented cost growth.· Written in the recipient's language
拝啓
平素より格別のご高配を賜り、厚く御礼申し上げます。

2026-10-15付の原価比較に基づき、Bracket B-12の価格改定についてご協議をお願い申し上げます。
Labor: JPY 18,000,000 -> JPY 19,440,000 / 年
Steel materials: JPY 12,000,000 -> JPY 13,200,000 / 年
Electricity: JPY 2,400,000 -> JPY 2,880,000 / 年
Other overhead: JPY 3,600,000 -> JPY 3,480,000 / 年
年間増加額はJPY 3,000,000、年間120000個を前提とする単価改定希望額はJPY 25でございます。

公正取引委員会等の「労務費の適切な転嫁のための価格交渉に関する指針」を踏まえ、協議の機会を賜りたく存じます。取適法（旧下請法）の適用がある場合の協議に応じない一方的な代金決定の禁止も踏まえ、根拠資料をご説明し、誠実に協議させていただければ幸いです。
本書は価格交渉のお願いであり、上記金額の法的な支払義務を主張するものではございません。ご都合のよい協議日程をご教示賜りますようお願い申し上げます。

敬具
Osaka Precision Works KK