"Admit It and You'll Be Out Sooner": Confession, Detention and Your Status of Residence in a Japanese Drug Case

Clients and their families often tell us that during questioning they were told, in one form or another, that admitting the facts would get them out quickly and fighting the case would drag it out. When you think about your job and your family, wanting to be released even a day earlier is entirely natural. But in a drug case involving a foreign national, getting out quickly and staying in Japan are not always the same goal. This article sets out where the two diverge and how to approach questioning.

Key points

• Early release and protecting your status of residence (在留資格) are separate objectives, and at times they pull in opposite directions.
• In drug cases the conviction itself triggers deportation (退去強制) under article 24, item 4, sub-item (chi) of the Immigration Control and Refugee Recognition Act (入管法24条4号チ), regardless of how heavy the sentence is.
• Whether to answer questions is your right, and choosing to remain silent should not be treated as a reason for unfavourable treatment.
• Statements given through an interpreter can shift in nuance by the time they appear in the written record, so the read-back stage matters.
• A record showing that intent (故意) was contested can become the foundation of your arguments in the later immigration process.

Is getting out of detention quickly the same as being able to stay in Japan?

Unfortunately, not always. This is the point most often misunderstood in criminal cases involving foreign nationals.

It is true that when the facts are admitted and the issues fall away, the process can move faster. But in a drug case, what waits at the end of that road is a conviction. Article 24, item 4, sub-item (chi) of the Immigration Control and Refugee Recognition Act makes a person who has been convicted of violating the Narcotics and Psychotropics Control Act, the Act on Regulation of Cannabis Plant Cultivation, the Opium Act, the Stimulants Control Act, the Anti-Drug Special Provisions Act, or Chapter XIV of Part II of the Penal Code subject to deportation. It says nothing about the type of sentence or its length. A fine, an exemption from punishment, and a suspended sentence all fall within it. You may be released sooner, only to find that the immigration process then begins.

How should you understand being told that admitting the facts means earlier release?

First, look calmly at what is actually being promised. Whether detention continues is decided by a judge, and whether to bring charges is decided by a prosecutor. A prediction offered in the interrogation room does not guarantee an outcome.

Beyond that, recovering from having admitted something untrue is far harder than most people imagine. Once a written statement exists it stays in the record, and if you change your account later you will be asked why you said what you said at first. Conversely, where there are facts that ought to be acknowledged, stating them honestly and then building up mitigating circumstances can work in your favour. The essential point is one of sequence: establish what the facts are, and only then decide the approach, rather than deciding first whether to admit or deny.

The right to remain silent, and signing a written statement

Whether to speak is for you to decide. Declining to answer particular questions is the exercise of a right the law recognises, and there is nothing shameful in it. We make a point of explaining this clearly at the very first visit.

A written statement is not a transcript of your words. It is a summary prepared by the side conducting the questioning. After it is read back to you, you are asked to sign. If the content differs from what you said, you can ask for corrections on the spot, and you can refuse to sign. The one thing to avoid is signing something you do not understand.

• You may choose not to answer questions you do not wish to answer
• If something in the statement feels wrong, ask for it to be corrected there and then
• You do not have to sign a document you do not understand
• Anything about the questioning that concerns you should be described in detail to your defence counsel at the next visit

What can go wrong when statements pass through an interpreter

When a procedure crosses languages, fine shades of meaning are easily lost. "I thought it might be" becomes "I knew". "Someone asked me to hold it" is summarised as "I received it". Differences of that kind can be decisive when intent is assessed.

The interpreter arranged by the investigating authorities is there so that the procedure can go forward. That person is not there to stand in your position and think with you about which word to choose. That is precisely why going over the facts carefully in your own language, through an interpreter on the defence side, is worth doing.

Why a record of contesting intent matters later

Drug cases frequently turn on awareness: the client was only holding a package, or did not know what was inside. Setting that out carefully during the criminal process, and leaving it in the record, also matters in the immigration process that may follow.

Immigration practice has long proceeded on the basis that intent or negligence is not an element in determining grounds for deportation. In a case concerning deportation on the basis of facilitating illegal employment, attorney Daisuke Matsumura is currently continuing litigation that asks directly whether the principle of individual culpability should extend to deportation as an administrative disposition. We cannot anticipate the outcome, and we note that the point is still being litigated. What can be said plainly is the practical significance: contesting the content of the client's awareness at the criminal stage, and leaving a record of how that unfolded, provides the foundation for building the second line of defence.

By contrast, admitting everything in the hope of getting out quickly narrows the room to contest awareness later.

About our office

At Funado International Law Office, attorney Daisuke Matsumura personally handles every stage, from the first visit at the detention facility through to the close of trial. The approach to questioning has to be adjusted as circumstances change day by day, which is why we keep the same lawyer on the case throughout.

For Chinese we have a dedicated interpreter on staff who is experienced in cases involving foreign nationals. Separate from the interpreter appointed by the investigating authorities, this interpreter works for the client and is available throughout the criminal process, so that the nuance of a statement can be checked in the client's own language before decisions are made. For languages other than Chinese, we arrange an interpreter according to the needs of the case. For residence procedures required after the criminal case ends, we work together with an affiliated administrative scrivener.

From the cases we have handled

In a matter where the client was accused of acting as a collector in an organised fraud scheme and was rearrested several times, we designed the response to each round of questioning in detail, objected clearly to improper questioning, and built up our arguments and evidence, obtaining decisions not to prosecute (不起訴処分) on every count. It was a case in which how the questioning was handled decided the outcome.

In another matter, a client prosecuted under the Stimulants Control Act for possession with profit-making purpose (営利目的) was acquitted after thorough analysis of the evidence together with examination of the defendant and cross-examination. In the case of a woman wrongly accused of facilitating illegal employment, we are continuing litigation testing the reach of the principle of individual culpability, and in that matter obtained special permission to stay (在留特別許可) in circumstances where the offence had been found, which had no precedent.

Wanting to get out quickly is not a mistaken instinct. Before you decide, though, take the time to go over the facts with your lawyer. With a carefully designed approach, release from detention and keeping your residence in Japan can both be pursued at once. Please note that this article is a general explanation; for your own case, consult a lawyer directly. Past results reflect the particular circumstances of those cases and are not a guarantee of a similar outcome.

This article reflects the law as at August 2026.

About the author

Daisuke Matsumura, Attorney at Law
Dai-Ichi Tokyo Bar Association (registration no. 59077, admitted 2019)
Funado International Law Office (Fuse Building Main Wing 3F, 3-4-10 Takada, Toshima-ku, Tokyo)
Practice focused on criminal defence for foreign nationals and immigration proceedings.
Results include an acquittal in a Stimulants Control Act case (possession for the purpose of profit), non-prosecution in organised fraud cases, and special permission to stay in cases regarded as difficult.

Funado International Law Office
Website: https://matsumura-lawoffice.jp/
WeChat ID: matsumura1119