Nihon Kojin Bango Input

NihonKojinBangoInput is a headless input for entering Japan's Individual Number / My Number (マイナンバー), Japan's government-issued personal identifier. It renders as <input type="text"> with autocomplete="off" to protect sensitive identifiers. It is the editable companion to NihonKojinBangoView.

Status: beta — implemented and unit-tested in all seven frameworks; not yet exercised in a composed flow.

Implementation Notes

• Renders as <input type="text">
• Format: Twelve digits, issued to every resident of Japan since 2016. The twelfth digit is a check digit: the first eleven digits are each multiplied by a position-dependent weight (6,5,4,3,2 for positions 1-5; 7,6,5,4,3,2 for positions 6-11), summed, taken Modulus-11, and the remainder subtracted from 11 (remainders of 0 or 1 both yield a check digit of 0).
• autocomplete="off" to protect sensitive identifiers
• Supports two-way binding on the value prop
• Companion to NihonKojinBangoView

Props

• label: string (required) — accessible label via aria-label
• value: string (default: "") — bindable input value
• required: boolean (default: false) — form validation
• disabled: boolean (default: false) — disabled state
• ...restProps: any — additional HTML attributes spread onto the <input>

Usage

<Field label="Individual Number / My Number (マイナンバー)" required>
  <NihonKojinBangoInput label="Individual Number / My Number (マイナンバー)" value={value} required />
  <Hint>Twelve digits, issued to every resident of Japan since 2016. The twelfth digit is a check digit: the first eleven digits are each multiplied by a position-dependent weight (6,5,4,3,2 for positions 1-5; 7,6,5,4,3,2 for positions 6-11), summed, taken Modulus-11, and the remainder subtracted from 11 (remainders of 0 or 1 both yield a check digit of 0).</Hint>
  <ErrorMessage>Please enter a valid Individual Number / My Number</ErrorMessage>
</Field>

ARIA

• aria-label={label} — provides accessible name

When to Use

• Use in forms collecting Japan's Individual Number / My Number (マイナンバー).
• Use in administrative or national-id workflows where the identifier is required.

When Not to Use

• Do not use for displaying read-only identifiers — use nihon-kojin-bango-view instead.
• Do not use for general text input — use text-input instead.
• Do not use for other countries' identifiers — use the corresponding country-specific input.

Headless

This headless component ships zero CSS. The consumer provides all styling targeting the .nihon-kojin-bango-input class hook.

Testing

• Verify renders an <input> with the correct class and type="text"
• Verify aria-label is set from the label prop
• Verify autocomplete="off"
• Verify value binding works

Domain Knowledge

Twelve digits, issued to every resident of Japan since 2016. The twelfth digit is a check digit: the first eleven digits are each multiplied by a position-dependent weight (6,5,4,3,2 for positions 1-5; 7,6,5,4,3,2 for positions 6-11), summed, taken Modulus-11, and the remainder subtracted from 11 (remainders of 0 or 1 both yield a check digit of 0).

Where to find it: Printed on the Individual Number Card (マイナンバーカード) and the paper Notification Card, and required when enrolling in Japan's National Health Insurance (国民健康保険).

Related components

• nihon-kojin-bango-view — a read-only display of Japan's Individual Number / My Number (マイナンバー)
• text-input — a single-line text input field <input type="text">

References

• Wikipedia: Individual Number

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