セルシン散1%
Diazepam (Valium)
Diazepam · セルシン · ホリゾン
Diazepam is sold in Japan as Cercine and Horizon (2, 5 and 10 mg tablets) for anxiety, muscle spasm and alcohol withdrawal. It is a controlled psychotropic with the usual 1-month, within-limit rule for travelers. Japanese doctors now prefer shorter-acting benzodiazepines or non-benzodiazepine alternatives, so long-term diazepam users should bring records.
At a glance
- Prescription status
- Prescription only
- Over the counter
- Not sold OTC
- Bringing it into Japan
- ⚠ Allowed within limits (psychotropic)
- Names abroad
- Valium
Over the counter
Prescription only.
Prescription products in Japan
19 productsProducts on Japan's national drug price list. Prescription only: a clinic visit is needed, and pharmacies may substitute a generic with the same ingredient.
| Brand names | セルシン · ホリゾン |
|---|---|
| Generic | 12 generic products |
| Dosage forms | Oral |
| Strengths (oral) | 2mg · 5mg · 10mg |
| Official price (per tablet or unit) | ¥6.1 – ¥10.8 Official NHI drug price. Patients with Japanese insurance pay 10–30%; visitors without it pay the full price plus consultation fees. |
Product names are shown in Japanese, exactly as printed on the package and the prescription. Show this page at the pharmacy.
ホリゾン散1%
2mgセルシン錠
ホリゾン錠2mg
5mgセルシン錠
ホリゾン錠5mg
10mgセルシン錠
ジアゼパム錠2mg
5 manufacturers: アメル · タイホウ · ツルハラ · サワイ · トーワ
ジアゼパム錠5mg
4 manufacturers: アメル · タイホウ · ツルハラ · トーワ
ジアゼパム錠10mg
ツルハラ
All listed products (19) · Drug price list as of 2026-08-12
| 10mgセルシン錠 | Oral · ¥10.8/tablet |
|---|---|
| 2mgセルシン錠 | Oral · ¥6.4/tablet |
| 5mgセルシン錠 | Oral · ¥10/tablet |
| セルシン散1% | Oral · ¥9.4/g |
| ホリゾン散1% | Oral · ¥10.6/g |
| ホリゾン錠2mg | Oral · ¥6.4/tablet |
| ホリゾン錠5mg | Oral · ¥10/tablet |
| ジアゼパム2mg錠 · Generic | Oral · ¥6.1/tablet |
| ジアゼパム5mg錠 · Generic | Oral · ¥6.2/tablet |
| ジアゼパム錠10mg「ツルハラ」 · Generic | Oral · ¥6.1/tablet |
| ジアゼパム錠2mg「アメル」 · Generic | Oral · ¥6.1/tablet |
| ジアゼパム錠2mg「タイホウ」 · Generic | Oral · ¥6.1/tablet |
| ジアゼパム錠2mg「ツルハラ」 · Generic | Oral · ¥6.1/tablet |
| ジアゼパム錠2「サワイ」 2mg · Generic | Oral · ¥6.1/tablet |
| ジアゼパム錠2「トーワ」 2mg · Generic | Oral · ¥6.1/tablet |
| ジアゼパム錠5mg「アメル」 · Generic | Oral · ¥6.2/tablet |
| ジアゼパム錠5mg「タイホウ」 · Generic | Oral · ¥6.2/tablet |
| ジアゼパム錠5mg「ツルハラ」 · Generic | Oral · ¥6.2/tablet |
| ジアゼパム錠5「トーワ」 5mg · Generic | Oral · ¥6.2/tablet |
Bringing it into Japan
Classified as a psychotropic in Japan. Up to a 1-month supply within the per-substance limit set by the Narcotics Control Department needs no permit; larger amounts or injectable forms need a doctor's certificate and advance approval.
Narcotics Control Department — Bringing narcotics and psychotropics into Japan
Getting it prescribed in Japan
Any clinic can prescribe it after a consultation. Bring the original packaging or a medication list. Use the hospital finder to find clinics with English-speaking staff or an international patient office.
Names abroad
| US | Valium |
|---|---|
| UK | Valium, Diazemuls |
| Korea | 발륨, 디아제팜 |
| China | 安定, 地西泮 |
| Taiwan | 煩寧 |
Sources
- Health Insurance Claims Review & Reimbursement Services — Drug master (NHI drug price list) shinryohoshu.mhlw.go.jp — 2026-08-12
- Ministry of Health, Labour and Welfare — Bringing medicines for personal use into Japan mhlw.go.jp
- Narcotics Control Department — Bringing narcotics and psychotropics into Japan ncd.mhlw.go.jp
This page describes how a medicine is regulated and sold in Japan. It is not medical advice and does not cover dosing for your situation; follow your doctor's and pharmacist's instructions.