# Article 12, paragraph (5), its wordings — Arbitration Act

This is the Markdown twin of https://japanlaw.org/en/arbitration-act/history/art-12/par-5. Every law, and how to address a provision: https://japanlaw.org/llms.txt. The same laws as MCP tools (no sign-in): https://japanlaw.org/mcp.

How the wording of Article 12, paragraph (5) (第十二条第五項) changed with each amendment, and how it will change.

- Law: Arbitration Act (仲裁法) — https://japanlaw.org/en/arbitration-act
- Provision: Article 12, paragraph (5) (第十二条第五項) — https://japanlaw.org/en/arbitration-act/art-12/par-5 (as Markdown: https://japanlaw.org/md/en/arbitration-act/art-12/par-5)
- The law's amendments: https://japanlaw.org/en/arbitration-act/amendments
- 2 wordings, oldest first.

## 1. Before Act No. 53 of 2023

- State: In force

Japanese:

> 仲裁手続における通知を書面によってする場合において、名宛人の住所、常居所、営業所、事務所及び配達場所の全てが相当の調査をしても分からないときは、当事者間に別段の合意がない限り、発信人は、名宛人の最後の住所、常居所、営業所、事務所又は配達場所に宛てて当該書面を書留郵便その他配達を試みたことを証明することができる方法により発送すれば足りる。この場合においては、当該書面が通常到達すべきであった時に通知がされたものとする。

English (Japanese Law Translation, Ministry of Justice):

> Unless otherwise agreed between the parties, if a notice in an arbitration procedure is to be given by means of documents, and the addressee's domicile, habitual residence, business office, office, and place of delivery are all impossible to find after making a reasonable inquiry, it is sufficient for the sender to send the document to the addressee's last-known domicile, habitual residence, business office, office, or place of delivery by registered mail or any other means by which they can certify that they have attempted to deliver it. In this case, the notice is deemed to have been given at the time when the document should normally have arrived.

## 2. By 13 June 2028 — Act No. 53 of 2023

- State: Not yet in force
- Takes effect: By 13 June 2028
- The amendment: Moved to Article 14, paragraph (5); its words stay the same (Act No. 53 of 2023) — https://japanlaw.org/en/arbitration-act/amendments/20280613_505AC0000000053

Japanese:

> 仲裁手続における通知を書面によってする場合において、名宛人の住所、常居所、営業所、事務所及び配達場所の全てが相当の調査をしても分からないときは、当事者間に別段の合意がない限り、発信人は、名宛人の最後の住所、常居所、営業所、事務所又は配達場所に宛てて当該書面を書留郵便その他配達を試みたことを証明することができる方法により発送すれば足りる。この場合においては、当該書面が通常到達すべきであった時に通知がされたものとする。

English (Japanese Law Translation, Ministry of Justice):

> Unless otherwise agreed between the parties, if a notice in an arbitration procedure is to be given by means of documents, and the addressee's domicile, habitual residence, business office, office, and place of delivery are all impossible to find after making a reasonable inquiry, it is sufficient for the sender to send the document to the addressee's last-known domicile, habitual residence, business office, office, or place of delivery by registered mail or any other means by which they can certify that they have attempted to deliver it. In this case, the notice is deemed to have been given at the time when the document should normally have arrived.

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## Sources

- The dates and the amending laws: e-Gov (Digital Agency) (https://laws.e-gov.go.jp/law/415AC0000000138)
- English name of the law: Japanese Law Translation, Ministry of Justice (https://www.japaneselawtranslation.go.jp/en/laws/view/4440/tb)
- English titles of the amending laws: Written for this site with AI
- The Japanese text before: e-Gov (Digital Agency) (https://laws.e-gov.go.jp/law/415AC0000000138/20260521_504AC0000000048)
- The Japanese text after: e-Gov (Digital Agency) (https://laws.e-gov.go.jp/law/415AC0000000138/20280613_505AC0000000053)