# 健康保険法 / Health Insurance Act — 第百六十四条 (Article 164) - Law: 健康保険法 (Health Insurance Act), 大正十一年法律第七十号 - English title "Health Insurance Act": 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: 第百六十四条 (Article 164)（保険料の納付） — address `art-164` - Text in force since: 2026-10-01 - URL (the page that opens at this provision): https://japanlaw.org/ja/health-insurance-act/art-164 - Permanent URL (e-Gov law ID, never renamed): https://japanlaw.org/l/211AC0000000070/art-164 - 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. --- ### 第百六十四条（保険料の納付） — (Payment of Insurance Premiums) caption: Ministry of Justice translation — Japanese Law Translation Database System art-164 · https://japanlaw.org/ja/health-insurance-act/art-164 · https://japanlaw.org/l/211AC0000000070/art-164 **第一項** 被保険者に関する毎月の保険料は、翌月末日までに、納付しなければならない。ただし、任意継続被保険者に関する保険料については、その月の十日（初めて納付すべき保険料については、保険者が指定する日）までとする。 art-164/par-1 · https://japanlaw.org/ja/health-insurance-act/art-164/par-1 · https://japanlaw.org/l/211AC0000000070/art-164/par-1 Monthly insurance premiums related to insured persons must be paid by the last day of the following month; provided however, that insurance premiums relating to insured persons with optional and continued coverage must be made by the 10th day of the following (a day specified by the insurer for the first payment of an insurance premium). Ministry of Justice translation — Japanese Law Translation Database System **第二項** 保険者等（被保険者が協会が管掌する健康保険の任意継続被保険者である場合は協会、被保険者が健康保険組合が管掌する健康保険の被保険者である場合は当該健康保険組合、これら以外の場合は厚生労働大臣をいう。次項において同じ。）は、被保険者に関する保険料の納入の告知をした後に告知をした保険料額が当該納付義務者の納付すべき保険料額を超えていることを知ったとき、又は納付した被保険者に関する保険料額が当該納付義務者の納付すべき保険料額を超えていることを知ったときは、その超えている部分に関する納入の告知又は納付を、その告知又は納付の日の翌日から六月以内の期日に納付されるべき保険料について納期を繰り上げてしたものとみなすことができる。 art-164/par-2 · https://japanlaw.org/ja/health-insurance-act/art-164/par-2 · https://japanlaw.org/l/211AC0000000070/art-164/par-2 When an insurer (meaning JHIA if the relevant insured person has optional and continued coverage under the health insurance program administered by JHIA; a health insurance society if the relevant insured person is covered by a health insurance program administered by a health insurance society; or otherwise, the Minister of Health, Labour and Welfare; the same applies in the following paragraph) finds that the notified amount of insurance premium exceeds the amount to be paid for the insurance premium after the notice of insurance premium payment concerning an insured person is given, or that an insured person has paid an amount of insurance premium that exceeds the amount to be paid for the insurance premium, the notice of payment or the payment of the excessive amount may be deemed as prepayment for the insurance premium to be paid before the due date within six months after the day of the notice or payment. Ministry of Justice translation — Japanese Law Translation Database System **第三項** 前項の規定によって、納期を繰り上げて納入の告知又は納付をしたものとみなしたときは、保険者等は、その旨を当該納付義務者に通知しなければならない。 art-164/par-3 · https://japanlaw.org/ja/health-insurance-act/art-164/par-3 · https://japanlaw.org/l/211AC0000000070/art-164/par-3 When a notice of payment or payment of an excessive amount may be deemed as prepayment, the insurer must notify the person obliged to pay to that effect. Ministry of Justice translation — Japanese Law Translation Database System --- ## Cites - art-164/par-2: 次項 → 健康保険法 第百六十四条第三項 (Article 164, paragraph (3)), art-164/par-3 — https://japanlaw.org/ja/health-insurance-act/art-164/par-3 · https://japanlaw.org/l/211AC0000000070/art-164/par-3 - art-164/par-3: 前項 → 健康保険法 第百六十四条第二項 (Article 164, paragraph (2)), art-164/par-2 — https://japanlaw.org/ja/health-insurance-act/art-164/par-2 · https://japanlaw.org/l/211AC0000000070/art-164/par-2 ## Cited by 6 provisions cite this one. No official source publishes this direction. - 健康保険法 第三十九条第一項（資格の得喪の確認） — https://japanlaw.org/ja/health-insurance-act/art-39/par-1 · https://japanlaw.org/l/211AC0000000070/art-39/par-1 - 健康保険法 第百六十四条第二項（保険料の納付） — https://japanlaw.org/ja/health-insurance-act/art-164/par-2 · https://japanlaw.org/l/211AC0000000070/art-164/par-2 - 健康保険法 第百六十四条第三項（保険料の納付） — https://japanlaw.org/ja/health-insurance-act/art-164/par-3 · https://japanlaw.org/l/211AC0000000070/art-164/par-3 - 健康保険法 第百六十九条第八項（日雇特例被保険者に係る保険料の負担及び納付義務） — https://japanlaw.org/ja/health-insurance-act/art-169/par-8 · https://japanlaw.org/l/211AC0000000070/art-169/par-8 - 健康保険法 第二百五条の二第一項第六号（機構への事務の委託） — https://japanlaw.org/ja/health-insurance-act/art-205-2/par-1/item-6 · https://japanlaw.org/l/211AC0000000070/art-205-2/par-1/item-6 - 健康保険法 附則第二条第七項（健康保険組合の財政調整） — https://japanlaw.org/ja/health-insurance-act/suppl-2111-70/art-2/par-7 · https://japanlaw.org/l/211AC0000000070/suppl-2111-70/art-2/par-7 --- ## Sources - e-Gov 法令検索, Digital Agency (デジタル庁) — 健康保険法 — the text in force from 2026-10-01 (https://laws.e-gov.go.jp/law/211AC0000000070/20261001_507AC0000000087), retrieved 2026-10-10 - Japanese Law Translation Database System, Ministry of Justice (法務省) — Health Insurance Act — Ministry of Justice translation (https://www.japaneselawtranslation.go.jp/en/laws/view/3266/tb), retrieved 2026-10-10 - This site's parser, version 189 — 健康保険法 — structure, counts, cross-references and defined terms, computed 2026-10-10