# 出入国管理及び難民認定法 / Immigration Control and Refugee Recognition Act — 第三十一条の三 (Article 31-3) This is the Markdown twin of https://japanlaw.org/ja/immigration-control-act/art-31-3. 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: 出入国管理及び難民認定法 (Immigration Control and Refugee Recognition Act), 昭和二十六年政令第三百十九号 - English title "Immigration Control and Refugee Recognition 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. - Issued as a Cabinet Order and given the force of an Act, which is why its number says 政令: Some rules made during the Allied occupation were issued as Cabinet Orders, as orders implementing Japan's acceptance of the Potsdam Declaration, and an Act passed in 1952 gave them the force of an Act. They keep the Cabinet Order number they were issued under, which is why e-Gov lists the law as an Act while its number says 政令 (Cabinet Order). The Immigration Control and Refugee Recognition Act (出入国管理及び難民認定法) is one: it was promulgated in 1951 as the Immigration Control Order (出入国管理令), Cabinet Order No. 319 of 1951, has had the force of an Act under Article 4 of Act No. 126 of 1952, took its present title on 1 January 1982, and every amendment on e-Gov's record of it was made by an Act. - Provision: 第三十一条の三 (Article 31-3)（通信履歴の電磁的記録の保全要請） — address `art-31-3` - Text in force since: 2026-10-01 - URL (the page that opens at this provision): https://japanlaw.org/ja/immigration-control-act/art-31-3 - Permanent URL (e-Gov law ID, never renamed): https://japanlaw.org/l/326CO0000000319/art-31-3 - 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. --- ### 第三十一条の三（通信履歴の電磁的記録の保全要請） — Request for Preservation of Electronic or Magnetic Records of Communication History caption: machine translation, not official art-31-3 · https://japanlaw.org/ja/immigration-control-act/art-31-3 · https://japanlaw.org/l/326CO0000000319/art-31-3 **第一項** 入国警備官は、差押え又は記録命令付差押えをするため必要があるときは、電気通信を行うための設備を他人の通信の用に供する事業を営む者又は自己の業務のために不特定若しくは多数の者の通信を媒介することのできる電気通信を行うための設備を設置している者に対し、その業務上記録している電気通信の送信元、送信先、通信日時その他の通信履歴の電磁的記録のうち必要なものを特定し、三十日を超えない期間を定めて、これを消去しないよう、書面で求めることができる。この場合において、当該電磁的記録について差押え又は記録命令付差押えをする必要がないと認めるに至つたときは、当該求めを取り消さなければならない。 art-31-3/par-1 · https://japanlaw.org/ja/immigration-control-act/art-31-3/par-1 · https://japanlaw.org/l/326CO0000000319/art-31-3/par-1 If it is necessary for carrying out a seizure or seizure with a recording order, an immigration control officer may, specifying the necessary electronic or magnetic records among the electronic or magnetic records of the source, destination, date and time and other communication history of telecommunications that are recorded in the course of business, and setting a period not exceeding 30 days, request in writing a person engaged in the business of providing facilities for telecommunications for the communications of others, or a person who has installed facilities for telecommunications capable of intermediating the communications of unspecified or a large number of persons for their own business, not to erase those records. In this case, if the officer comes to find that there is no need to carry out a seizure or seizure with a recording order with regard to the electronic or magnetic records, the officer must withdraw the request. machine translation, not official **第二項** 前項の規定により消去しないよう求める期間については、特に必要があるときは、三十日を超えない範囲内で延長することができる。ただし、消去しないよう求める期間は、通じて六十日を超えることができない。 art-31-3/par-2 · https://japanlaw.org/ja/immigration-control-act/art-31-3/par-2 · https://japanlaw.org/l/326CO0000000319/art-31-3/par-2 The period for which a request not to erase is made pursuant to the provisions of the preceding paragraph may, if particularly necessary, be extended within a range not exceeding 30 days; provided, however, that the total period for which the request not to erase is made may not exceed 60 days. machine translation, not official **第三項** 第一項の規定による求めを行う場合において、必要があるときは、みだりに当該求めに関する事項を漏らさないよう求めることができる。 art-31-3/par-3 · https://japanlaw.org/ja/immigration-control-act/art-31-3/par-3 · https://japanlaw.org/l/326CO0000000319/art-31-3/par-3 In making a request pursuant to the provisions of paragraph (1), if necessary, a request may be made that matters concerning the request not be divulged without good reason. machine translation, not official --- ## Cites - art-31-3/par-2: 前項 → 出入国管理及び難民認定法 第三十一条の三第一項 (Article 31-3, paragraph (1)), art-31-3/par-1 — https://japanlaw.org/ja/immigration-control-act/art-31-3/par-1 · https://japanlaw.org/l/326CO0000000319/art-31-3/par-1 - art-31-3/par-3: 第一項 → 出入国管理及び難民認定法 第三十一条の三第一項 (Article 31-3, paragraph (1)), art-31-3/par-1 — https://japanlaw.org/ja/immigration-control-act/art-31-3/par-1 · https://japanlaw.org/l/326CO0000000319/art-31-3/par-1 ## Cited by 2 provisions cite this one. No official source publishes this direction. - 出入国管理及び難民認定法 第三十一条の三第二項（通信履歴の電磁的記録の保全要請） — https://japanlaw.org/ja/immigration-control-act/art-31-3/par-2 · https://japanlaw.org/l/326CO0000000319/art-31-3/par-2 - 出入国管理及び難民認定法 第三十一条の三第三項（通信履歴の電磁的記録の保全要請） — https://japanlaw.org/ja/immigration-control-act/art-31-3/par-3 · https://japanlaw.org/l/326CO0000000319/art-31-3/par-3 --- ## Sources - e-Gov 法令検索, Digital Agency (デジタル庁) — 出入国管理及び難民認定法 — the text in force from 2026-10-01 (https://laws.e-gov.go.jp/law/326CO0000000319/20261001_508AC0000000032), retrieved 2026-10-05 - Japanese Law Translation Database System, Ministry of Justice (法務省) — Immigration Control and Refugee Recognition Act — Ministry of Justice translation (https://www.japaneselawtranslation.go.jp/en/laws/view/3624/tb), retrieved 2026-09-13 - claude-opus-5[1m] — Machine translation, batch immigration-control-act-20260913T134912-005, translated 2026-09-13 - This site's parser, version 223 — 出入国管理及び難民認定法 — structure, counts, cross-references and defined terms, computed 2026-10-05