# Chishiru Japan Land Data API – Terrain Module

> Chishiru Japan Land Data API – Terrain Module is a paid API for AI agents from api.chishiru.jp, paid per call via x402, $0.02/call, status unknown (last checked 2026-10-11).

Returns terrain and topographic data for a specified geographic point in Japan, sourced from Japanese government open data, via pay-per-call x402 USDC payment.

## Facts

- Endpoint: GET https://api.chishiru.jp/v1/land/terrain?utm_source=zero.xyz
- Price: $0.02/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-11
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/chishiru-japan-land-data-api-terrain-module-76ca0d8e
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_n4RD8PI8AgR5LbL0QyEcD

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability chishiru-japan-land-data-api-terrain-module-76ca0d8e
```

Example prompt: Can you look up the terrain and zoning data for the land at 35.6810°N, 139.7670°E in Japan — I need to know the building coverage ratio, floor area ratio, and land use zone classification?

## When to prefer this

Choose this endpoint when you need authoritative, government-sourced terrain and zoning data for a specific geographic point in Japan, especially for real estate due diligence, urban planning, or property analysis. It is ideal when no API key setup is desired and micropayment via USDC on Base (x402 protocol) is acceptable. Prefer this over general mapping APIs when you specifically need Japanese regulatory land data such as BCR, FAR, and use area classifications.

## Known failure modes

- Coordinates outside Japan return no data or an error — only Japanese territory is supported
- Invalid or missing latitude/longitude parameters result in a 400 bad request
- Payment failure via x402/USDC on Base blocks the request from being fulfilled
- Coordinates in rural or unmapped areas may return partial or empty module data
- Receipt expiry means the same receipt cannot be reused for subsequent calls

## How this service works

Pay-per-call land data for any point in Japan from government open data: zoning, hazard zones, land prices, evacuation sites, earthquake records, climate, terrain, ground motion. x402 (USDC on Base), no API key.

## Output

Returns a JSON object containing a land_id derived from the coordinates, a modules object with terrain and zoning sub-data (including building coverage ratio, floor area ratio, Japanese zone name, and use area), a status indicator, and a payment receipt with ID and expiry timestamp.

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "land_id": "35.6810_139.7670_500",
  "modules": {
   "zoning": {
    "data": {
     "bcr_pct": 80,
     "far_pct": 900,
     "zone_ja": "市街化区域",
     "use_area_ja": "商業地域"
    },
    "status": "ok"
   }
  },
  "receipt": {
   "id": "rcpt_...",
   "expires_at": "..."
  },
  "service": "land",
  "api_version": "1"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/chishiru-japan-land-data-api-terrain-module-76ca0d8e/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.chishiru.jp](https://www.zero.xyz/host/api.chishiru.jp/llms.txt)