# Japan Business Calendar – Is Business Day

> Japan Business Calendar – Is Business Day is a paid API for AI agents from torii-gateway-production.ichis-lab.workers.dev, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-11).

Checks whether a given date is a Japanese business day, accounting for national holidays from the Cabinet Office official CSV.

## Facts

- Endpoint: GET https://torii-gateway-production.ichis-lab.workers.dev/v1/jp-biz-calendar/is-business-day?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-11
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/japan-business-calendar-is-business-day-3eaa3387
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_AfJK0pB9VRuUYvvLBa8Zu

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-business-calendar-is-business-day-3eaa3387
```

Example prompt: Can you check if January 8, 2024 is a business day in Japan? I need to know if we can process payments that day.

## When to prefer this

Use this endpoint when you need authoritative Japanese national holiday data sourced from the official Cabinet Office CSV for business-day logic in invoicing, payroll, logistics, or HR systems operating in Japan. Prefer it over hardcoded holiday lists or generic calendar libraries that may miss Japan-specific substitution holidays or recently added observances.

## Known failure modes

- Date outside supported year range → 404 Not Found, no charge
- Invalid date format (not YYYY-MM-DD) → 400 Bad Request
- Network/worker timeout → 5xx error
- Weekends with no holiday data may require caller to also check day-of-week separately

## How this service works

Tell whether a given date is a Japanese business day. Japanese national holidays and business-day calculations derived from the Cabinet Office official CSV. Returns holidays for a given year, plus business-day arithmetic used by invoicing, logistics and HR systems in Japan.

## Output

Returns a boolean or structured response indicating whether the queried date is a Japanese business day, along with any relevant holiday name if the date is a national holiday. Dates outside the range covered by the Cabinet Office CSV return a 404 and are not charged.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "date"
     ],
     "properties": {
      "date": {
       "type": "string",
       "pattern": "^\\d{4}-\\d{2}-\\d{2}$",
       "description": "Date to check, in YYYY-MM-DD (ISO 8601 calendar date, interpreted in UTC). Dates outside the years covered by the upstream CSV return 404 and are not charged."
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "data": {
   "date": "2026-01-05",
   "is_business_day": true
  },
  "meta": {
   "stale": false,
   "source_id": "jp-biz-calendar",
   "terms_url": "https://www.cao.go.jp/notice/rule.html",
   "fetched_at": "2026-09-21T03:00:00.000Z",
   "license_id": "PDL-1.0",
   "attribution": "出典:内閣府ウェブサイト(https://www8.cao.go.jp/chosei/shukujitsu/gaiyou.html)を加工して作成",
   "source_name": "内閣府「国民の祝日について」",
   "freshness_class": "static"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/japan-business-calendar-is-business-day-3eaa3387/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from torii-gateway-production.ichis-lab.workers.dev](https://www.zero.xyz/host/torii-gateway-production.ichis-lab.workers.dev/llms.txt)