# Japan Government Grants Search API

> Japan Government Grants Search API is a paid API for AI agents from api.kasanegi.com, paid per call via x402, $0.05/call, status unknown (last checked 2026-09-15).

Search Japanese government and public grants with filters for keyword, industry, prefecture, company size, and deadline

## Facts

- Endpoint: GET https://api.kasanegi.com/v1/grants/search
- Price: $0.05/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/japan-government-grants-search-api-50a0ee77
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_34jDyXo3UfUlrcDeIz8yA

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 japan-government-grants-search-api-50a0ee77
```

Example prompt: Search kasanegi for Japanese government grants available to small-sized companies in the manufacturing industry in Aichi prefecture, with a deadline within 90 days — show me up to 20 results.

## When to prefer this

Use this endpoint when you need to programmatically search Japanese government grants and public subsidies without scraping government websites. Ideal for agents helping Japanese SMEs find funding, fintech apps surfacing relevant grants, or business tools that need filtered grant discovery by industry, region, company size, or urgency (upcoming deadlines). Prefer this over raw scraping when you need clean, structured, filterable grant data in a single API call.

## Known failure modes

- Invalid company_size enum value returns 400 error
- Unsupported prefecture name or misspelling returns empty results
- deadline_within outside 1-365 range returns validation error
- limit exceeding 50 returns 400 error
- Payment not provided or insufficient USDC returns 402 Payment Required
- No matching grants found returns empty results array
- Japanese keyword encoding issues may reduce match quality

## How this service works

Stop scraping Japanese government and public-data sites. Call clean Japan payroll, company, and grant APIs over one host. Preview free; one public marketplace listing covers all current products; x402 direct is available for agent-native buyers.

## Output

A JSON array of matching Japanese government grant and subsidy programs, filtered by the specified criteria, including grant details such as name, description, eligibility, deadline, and relevant industry or prefecture information.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "method"
   ],
   "properties": {
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "properties": {
      "limit": {
       "type": "integer",
       "default": 10,
       "maximum": 50,
       "minimum": 1,
       "description": "Max results 1-50."
      },
      "offset": {
       "type": "integer",
       "default": 0,
       "minimum": 0,
       "description": "Pagination offset."
      },
      "keyword": {
       "type": "string",
       "description": "Keyword filter (Japanese or romaji)."
      },
      "verbose": {
       "type": "boolean",
       "default": false,
       "description": "Verbose."
      },
      "industry": {
       "type": "string",
       "description": "Industry filter."
      },
      "prefecture": {
       "type": "string",
       "description": "Prefecture filter."
      },
      "company_size": {
       "enum": [
        "micro",
        "small",
        "medium",
        "sme"
       ],
       "type": "string",
       "description": "Company size filter."
      },
      "deadline_within": {
       "type": "integer",
       "maximum": 365,
       "minimum": 1,
       "description": "Deadline within N days (1-365)."
      }
     }
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "mimeType": "application/json"
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/japan-government-grants-search-api-50a0ee77/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.kasanegi.com](https://www.zero.xyz/host/api.kasanegi.com/llms.txt)