# 商法 / Commercial Code — 第八百二十九条 (Article 829) This is the Markdown twin of https://japanlaw.org/en/commercial-code/art-829. 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. - Law: 商法 (Commercial Code), 明治三十二年法律第四十八号 - English title "Commercial Code": Ministry of Justice translation - Kind: Act — the distinction between 法律 (Act), 政令 (Cabinet Order), 省令 (Ministerial Order) and 条例 (local ordinance) decides who may issue it and what it may say. - Provision: 第八百二十九条 (Article 829)（告知義務違反による解除） — address `art-829` - Text in force since: 2026-06-24 - URL (the page that opens at this provision): https://japanlaw.org/en/commercial-code/art-829 - Permanent URL (e-Gov law ID, never renamed): https://japanlaw.org/l/132AC0000000048/art-829 - Every provision below carries its address and both URLs on the line under it. - Japanese text: e-Gov 法令検索, Digital Agency (デジタル庁). English: as marked on each line below. Only the Japanese as published by the government has legal effect; the text below is a copy of it. Every English rendering below is a translation and says which kind: the Ministry of Justice's translation, or this site's machine translation, whose model and date the Sources list names. They are never merged and never substituted for one another. --- ### 第八百二十九条（告知義務違反による解除） — (Cancellation Due to Breach of Duty to Inform) caption: Ministry of Justice translation — Japanese Law Translation Database System art-829 · https://japanlaw.org/en/commercial-code/art-829 · https://japanlaw.org/l/132AC0000000048/art-829 **第一項** 保険者は、保険契約者又は被保険者が、危険に関する重要な事項について、故意又は重大な過失により事実の告知をせず、又は不実の告知をしたときは、海上保険契約を解除することができる。この場合においては、保険法第二十八条第二項（第一号に係る部分に限る。）及び第四項並びに第三十一条第二項（第一号に係る部分に限る。）の規定を準用する。 art-829/par-1 · https://japanlaw.org/en/commercial-code/art-829/par-1 · https://japanlaw.org/l/132AC0000000048/art-829/par-1 An insurer may cancel a marine insurance policy if a policyholder or an insured intentionally or by gross negligence fails to inform it of the facts of material particulars relevant to risk or misinforms it of such particulars. In this case, the provisions of Article 28, paragraph (2) (limited to the part concerning item (i)) and paragraph (4), and Article 31, paragraph (2) (limited to the part concerning item (i)) of the Insurance Act apply mutatis mutandis. Ministry of Justice translation with a slip corrected by this site — not the Ministry's text; the Ministry printed: "An insurer may cancel a marine insurance policy if a policyholder or an insured intentionally or by gross negligence fails to inform to of the facts of material particulars relevant to risk or misinforms it of such particulars. In this case, the provisions of Article 28, paragraph (2) (limited to the part concerning item (i)) and paragraph (4), and Article 31, paragraph (2) (limited to the part concerning item (i)) of the Insurance Act apply mutatis mutandis." — https://www.japaneselawtranslation.go.jp/en/laws/view/4293/tb --- ## Cites - art-829/par-1: 保険法第二十八条第二項 → e-Gov law 420AC0000000056, 第二十八条第二項 (Article 28, paragraph (2)), art-28/par-2 — not held in this collection - art-829/par-1: 第一号 → e-Gov law 420AC0000000056, 第二十八条第二項第一号 (Article 28, paragraph (2), item (i)), art-28/par-2/item-1 — not held in this collection - art-829/par-1: 第四項 → e-Gov law 420AC0000000056, 第二十八条第四項 (Article 28, paragraph (4)), art-28/par-4 — not held in this collection - art-829/par-1: 第三十一条第二項 → e-Gov law 420AC0000000056, 第三十一条第二項 (Article 31, paragraph (2)), art-31/par-2 — not held in this collection - art-829/par-1: 第一号 → e-Gov law 420AC0000000056, 第三十一条第二項第一号 (Article 31, paragraph (2), item (i)), art-31/par-2/item-1 — not held in this collection --- ## Sources - claude-opus-5-5 — Corrections to the Ministry of Justice's English of paragraphs, written 2026-11-05 - e-Gov 法令検索, Digital Agency (デジタル庁) — 商法 — the text in force from 2026-06-24 (https://laws.e-gov.go.jp/law/132AC0000000048/20260624_508AC0000000046), retrieved 2026-11-05 - Japanese Law Translation Database System, Ministry of Justice (法務省) — Commercial Code (商法), Article 829, paragraph (1) — the Ministry of Justice's English as printed (https://www.japaneselawtranslation.go.jp/en/laws/view/4293/tb), retrieved 2026-11-05 - Japanese Law Translation Database System, Ministry of Justice (法務省) — Commercial Code — Ministry of Justice translation (https://www.japaneselawtranslation.go.jp/en/laws/view/4293/tb), retrieved 2026-11-05 - This site's parser, version 224 — 商法 — structure, counts, cross-references and defined terms, computed 2026-11-05