Get your TWX-21 orders and forecasts through an API

What you can build on TWX-21

• Get the order backlog

  Build this

  Reads the 注文残高一覧 (order backlog list) for the buyer you name: each open order with its item, quantity and delivery dates.

  Takes

  Buyer, item (optional)

  Returns

  Order number, item, quantity, requested delivery date, replied delivery date, open quantity

• Read an item's forecast and delivery plan

  Build this

  Reads the 所要注残受払画面 (requirements, backlog and receipts screen) for one item: the buyer's 所要計画 (requirement plan), order backlog, your replies, arrivals and stock by date.

  Takes

  Buyer, item

  Returns

  Date, requirement plan quantity, order backlog, replied delivery quantity, arrivals, stock, stage

• Check delivery delay alerts

  Build this

  Reads the delivery delay and stock shortage or excess alerts that the supply and demand adjustment service shows on screen for the buyer you name.

  Takes

  Buyer

  Returns

  Alert type, item, order number, requested delivery date, replied delivery date

• Reply with a delivery date

  Build this

  Opens an order or forecast line on the 納期回答画面 (delivery date reply screen), enters your delivery date and quantity, and sends the reply.

  Takes

  Buyer, order number or item, delivery date, quantity

  Returns

  Order number, item, replied delivery date, quantity, reply status

Automate TWX-21 with a workflow

A workflow runs your methods as one process, with nobody at the screen. A schedule or a call from your own system starts it, the steps run in order, and the result arrives in your inbox or in the systems you already use.

• New orders in the order backlog, every morning

  Build this

  Starts

  Every weekday at 7:30 Japan time

  Step 1

  For each buyer you name, get the order backlog from the 注文残高一覧.

  Step 2

  Keep the orders that were not there on the last run.

  Step 3

  Email you the new orders, one section per buyer, with item, quantity and requested delivery date.

• Forecast changes, posted to your planning system

  Build this

  Starts

  Every Monday at 8:00 Japan time

  Step 1

  For each item you name, read the forecast and delivery plan on the 所要注残受払画面.

  Step 2

  Keep the dates whose requirement plan quantity changed since the last run.

  Step 3

  Post item, date, old and new quantity and stage to your ERP or planning system's webhook.

• Delivery delay alerts, sent to your team's Slack

  Build this

  Starts

  Every weekday at 13:00 Japan time

  Step 1

  For each buyer you name, check the delivery delay and stock shortage or excess alerts.

  Step 2

  Stop when there are none.

  Step 3

  Post each alert, with item, order number and both delivery dates, to your Slack webhook.

You can run a workflow by hand on every plan, Free included. Schedules and webhook triggers come with the paid plans, from $29 a month.

Once built, one call from your code

Once you have built a method, it is one POST to /v1/runs from your backend, or a tool an AI agent calls over MCP. This is what “Get the order backlog” would look like.

curl https://api.fous.com/v1/runs \
  -H "Authorization: Bearer $FOUS_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "method": "portal.twx-21.hitachi.ne.jp/get_order_backlog",
    "input": {
      "buyer": "Acme Manufacturing",
      "item": null
    }
  }'

{
  "status": "completed",
  "data": {
    "buyer": "Acme Manufacturing",
    "orders": [
      {
        "order_number": "PO-260114",
        "item": "BRK-2041 Mounting bracket",
        "quantity": 500,
        "requested_delivery_date": "2026-11-25",
        "replied_delivery_date": null,
        "open_quantity": 500
      }
    ],
    "count": 1
  }
}

An example with invented data, not a ready-made endpoint. The method exists in your organization once you build it, and its name, inputs and fields follow your request.

TWX-21’s own options

Hitachi describes TWX-21's EDI as a cloud service that buyers set up for their suppliers, who work in it through the browser. For companies that exchange EDI files, Hitachi's data exchange service converts between protocols and formats. No API for suppliers is described on the service pages, and prices are not listed there.

Read on November 12, 2026: Customizable data exchange service, Supply and demand adjustment service, Web-EDI/BB setup for Microsoft Edge.

Signing in to TWX-21

TWX-21 PORTAL signs you in with a Login ID and a password of 8 to 32 characters with letters and numbers. When a regular ID forgets its password, the company's administrator issues it a one-time password. With Fous you sign in once through TWX-21's own sign-in with your own Login ID: the login is sealed with AES-256, and an expired session is signed back in.

Worth knowing

Each buyer sets its own screens

Hitachi lets each company set the items and data fields shown on its screens. The same list can show different columns for two buyers, so check the fields a method returns for each buyer you add.

Forecasts come in three stages

You can reply with a delivery plan at three stages: 所要計画 (requirement plan), 予約注文 (provisional order) and 確定注文 (firm order). Keep the stage with each quantity you read.

One tab per browser at sign-in

Hitachi notes that signing in to the Portal with several tabs open in the same browser can end in an error, and asks you to close every window and sign in again.

Slips and tags print as PDF

Delivery slips and tags (納品書・荷札) print as PDF, and lists download as CSV files. A pop-up blocker can stop CSV downloads, so the Web-EDI/BB setup guide asks you to allow pop-ups for twx-21.hitachi.ne.jp and twx-21.com.

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