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Mart402 Japan Dependent Income Threshold (Fuyou Wall) Analyzer
x402
Mart402 Japan Dependent Income Threshold (Fuyou Wall) Analyzer is a paid API for AI agents from mart402.com, paid per call via x402, $0.02/call, status unknown (last checked 2026-10-01).
Calculates Japan's income-wall thresholds (fuyou/103万/106万/130万 walls) for tax and social insurance dependent eligibility, with time-versioned 2026-10 rule changes and spousal/student limits.
Price / call$0.02
Success—
StatusUnknown
How this service works
Japan income-wall analysis (fuyou/103-106-130 walls): tax wall derived from the engine, social insurance walls time-versioned (2026-10 rule change), spousal + student dependent (1.5M/1.88M) walls. $0.02/call.
Output
Returns a structured breakdown of all applicable Japan income-wall thresholds for the given year and income level, including the 103万 tax wall, 106万 and 130万 social insurance walls, spousal deduction walls (1.5M/1.88M), and student dependent limits. Indicates which walls the provided income is above or below, with time-versioned adjustments for the 2026-10 rule change where applicable.
Example use cases
Part-timer checking fuyou wall eligibility
“My wife earns about 1.05 million yen a year — is she still under Japan's dependent tax and social insurance walls for 2025, and what are the exact thresholds she needs to stay under?”
HR planning for 2026 rule change impact
“We have employees whose spouses work part-time. Can you run the Japan dependent income walls for 2026 so we can warn them before the October 2026 social insurance rule change kicks in?”
Student dependent income limit check
“My daughter is a university student earning about 1.4 million yen from part-time work in 2025 — does she still qualify as a dependent under Japan's 1.5M and 1.88M student thresholds?”
Technical details
Endpoint
POSThttps://mart402.com/v1/jp-dependent-threshold?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need precise, time-versioned Japan-specific dependent income wall calculations — especially when navigating the 2026-10 social insurance rule change, spousal deduction thresholds, or student dependent limits. Prefer this over generic tax calculators when the specific fuyou/103/106/130万 wall determination matters for compliance or payroll planning.
Side effects
- Missing required field 'year' or 'annual_income_yen' returns a validation error
- Year outside supported range may return an error or unversioned result
- Non-numeric income values cause schema validation failure
- Edge-case incomes exactly on a threshold boundary may return ambiguous classification
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| year | number | |
| annual_income_yen | number |
Tags
x402
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