Journal profile · Medicine, General & Internal
Internal Medicine
ISSN 0918-2918 · eISSN 1349-7235 · Japanese Society of Internal Medicine · JAPAN · Monthly · Founded 1992
Internal Medicine: CAS Zone 4 · Medicine (2025 upgraded edition); impact factor 0.91; fully open access; review about 2.2 months (community reports); community-reported acceptance: about 70%; 686 articles in 2025; indexed in SCIE and Scopus.
Scope
Aims, scope and focus
Internal Medicine is published by Japanese Society of Internal Medicine and is in Zone 4 of Medicine in the CAS Journal Ranking (2025 upgraded edition). By OpenAlex counts of its recent articles, its largest topics are Interstitial Lung Diseases and Idiopathic Pulmonary Fibrosis, Vasculitis and related conditions and Neuroendocrine Tumor Research Advances, together about 18.2% of its articles. Its main subfields are Pulmonary and Respiratory Medicine. (generated from OpenAlex topic counts and CAS ranking data)
Internal Medicine is an open-access online only journal published monthly by the Japanese Society of Internal Medicine. Articles must be prepared in accordance with "The Uniform Requirements for Manuscripts Submitted to Biomedical Journals (see Annals of Internal Medicine 108: 258-265, 1988), must be contributed solely to the Internal Medicine, and become the property of the Japanese Society of Internal Medicine. Statements contained therein are the responsibility of the author(s). The Society reserves copyright and renewal on all published material and such material may not be reproduced in any form without the written permission of the Society.
Source: LetPub
Research area (LetPub): Medicine, General & Internal
Main research topics OpenAlex counts of recent articles; shares are approximate
- Interstitial Lung Diseases and Idiopathic Pulmonary FibrosisMedicine6.9%
- Vasculitis and related conditionsMedicine6.1%
- Neuroendocrine Tumor Research AdvancesMedicine5.2%
- Eosinophilic Disorders and SyndromesMedicine5.2%
- Lymphoma Diagnosis and TreatmentMedicine4.9%
- Peripheral Neuropathies and DisordersMedicine4.7%
- Gastrointestinal disorders and treatmentsMedicine4.5%
- Liver Disease Diagnosis and TreatmentMedicine4.5%
Rankings & indexing
CAS ranking and database indexing
CAS Journal Ranking
CAS Journal Ranking, upgraded edition (March 2025)Medicine Zone 4
| Level | Category | Zone |
|---|---|---|
| Major | Medicine | Zone 4 |
| Minor | Medicine, General & Internal | Zone 4 |
Top journal: noReview journal: no
CAS Xinrui Journal Ranking (March 2026)Medicine Zone 4
| Level | Category | Zone |
|---|---|---|
| Major | Medicine | Zone 4 |
| Minor | Medicine, General & Internal | Zone 4 |
Top journal: noReview journal: not marked
CAS Journal Ranking, previous upgraded edition (December 2023)Medicine Zone 4
| Level | Category | Zone |
|---|---|---|
| Major | Medicine | Zone 4 |
| Minor | Medicine, General & Internal | Zone 4 |
Top journal: noReview journal: no
Database indexing
SCIEScopusLetPub
International journal early-warning lists: not listed in any editionLetPub
Editions, and major and minor categories, are shown separately and never merged into one zone; check which edition your institution uses before you submit or report.
Metrics
Impact metrics and publication volume
Impact
- Impact factor
- 0.91LetPub ·
- CiteScore 2026-06
- 1.9LetPub ·
- SJR 2026-06
- 0.33LetPub ·
- SNIP 2026-06
- 0.53LetPub ·
- h-index
- 64LetPub ·
- h-index
- 97OpenAlex ·
- i10-index
- 5,687OpenAlex ·
- 2-year mean citedness
- 0.87OpenAlex ·
- Self-citation rate
- 10%LetPub ·
- Share of gold OA articles
- 99.42%LetPub ·
Volume
- Articles per year
- 713LetPub ·
Articles by year OpenAlex count · 17,221 in total · the current year is incomplete
| Year | Articles | Open access | Citations |
|---|---|---|---|
| 2026 | 566 | 566 | 81 |
| 2025 | 686 | 686 | 461 |
| 2024 | 654 | 654 | 1,110 |
| 2023 | 658 | 658 | 1,876 |
| 2022 | 761 | 761 | 3,217 |
| 2021 | 771 | 771 | 3,863 |
Sources count differently and were observed at different times, so each source's own value is kept; "publisher" marks figures from the journal's website.
Review & acceptance
Review time and acceptance
- Average review time (community reports)
- about 2.2 monthsLetPub ·
- Average acceptance (community reports)
- 70%LetPub ·
Community reports come from authors' own submissions (confidence 0.5) and are not a promise from the journal; for publisher figures, the journal's own definitions apply.
Fees & open access
APC and open-access policy
Fully open accessOpenAlex
Every article is open access; authors usually pay an article processing charge (APC).
No source has fee information yet; check the journal's website.
The journal's website is authoritative for fees; sources were observed at different times and each keeps its own value, without averaging.
Profile
Publication details and official links
- Publisher
- Japanese Society of Internal Medicine
- Country or region
- JAPAN
- Language
- English
- Frequency
- Monthly
- Founded
- 1992
- ISSN
- 0918-2918
- Electronic ISSN
- 1349-7235
- Official links
- Journal homepage ↗OpenAlex
- Submission system ↗LetPub
FAQ
Frequently asked questions about Internal Medicine
What CAS zone is Internal Medicine in?
In the 2025 upgraded edition of the CAS Journal Ranking, Internal Medicine is in Zone 4 of Medicine, and in Zone 4 of the minor category Medicine, General & Internal. In the 2026 Xinrui edition it is in Zone 4 of Medicine. Zones from different editions, and from major and minor categories, are not interchangeable.
What is the impact factor of Internal Medicine?
The latest impact factor listed by LetPub is 0.91; CiteScore 1.9, h-index 97.
How long does peer review take at Internal Medicine?
Authors report an average review time of about 2.2 months; the community-reported acceptance is “about 70%”. Article statistics cover accepted papers only, publisher figures follow the journal's own definitions, and community reports come from authors' own submissions; none is a promise from the journal.
Which databases index Internal Medicine?
According to LetPub and DOAJ records, Internal Medicine is indexed in SCIE and Scopus.
Is Internal Medicine open access, and what is the APC?
Internal Medicine is a fully open-access journal. Fee information is not available yet; check the journal's website.
Sources and updates
The facts on this page come from LetPub, OpenAlex; every figure is tagged with its source and the date it was observed, and conflicting values are kept per source. LetPub source page: view ↗ (archived 2026-08-26). Last updated: .