63.17

Million
Patients

Hospital Database

(Last updated: June 2026)
[Data availability: April 2008 to end of April 2026]
The start date of available data varies by hospital.
Hospital data is a compilation of receipt and DPC data allocated to a single patient ID registered in the medical institution, allowing longitudinal tracking of treatments and disease progression within that hospital.

21.02

Million
Patients

Health Insurance
Database

(Last updated: December 2023)
[Data availability: April 2012 to end of September 2023]

Database Insights &
Rankings

We analyze Japan’s largest hospital database to deliver regularly updated rankings and key trends each month.

①-1 Top 10 Prescription Drugs by Sales Amount Among Rheumatoid Arthritis Patients in DPC Data (May 2025-April 2026)
Product Name Actual Number of Patients Number of Cases Total Cost (JPY)
1 Actemra 7,423 56,558 5,353,027,081
2 Orencia 3,468 22,214 3,887,431,717
3 Simponi 2,294 15,427 3,339,192,940
4 Rinvoq 2,947 17,835 2,727,456,489
5 Olumiant 2,291 13,521 2,168,851,407
①-2 Top 10 Prescription Drugs by Sales Amount Among Rheumatoid Arthritis Patients in Health Insurance Data (April 2025-March 2026)
Product Name Actual Number of Patients Number of Cases Total Cost (JPY)
1 Actemra 580 4,469 380,041,076
2 Simponi 149 898 192,233,909
3 Rinvoq 191 976 191,081,969
4 Olumiant 143 848 159,098,700
5 Orencia 146 986 158,798,389
②-1 Prescription Drugs by Sales Amount Among Anticancer Drugs in DPC Data (May 2025-April 2026)
Product Name Actual Number of Patients Number of Cases Total Cost (JPY)
1 Keytruda 27,143 157,701 74,209,463,027
2 Opdivo 15,489 124,577 42,194,697,073
3 Tagrisso 11,667 107,695 38,367,528,149
4 Imfinzi 9,248 46,675 36,381,431,083
5 Tecentriq 7,719 46,313 26,287,718,546
②-2 Top 10 Prescription Drugs by Sales Amount Among Anticancer Drugs in Health Insurance Data (April 2025-March 2026)
Product Name Actual Number of Patients Number of Cases Total Cost (JPY)
1 Keytruda 389 2,466 1,105,817,328
2 Verzenio 310 2,314 874,833,282
3 Opdivo 178 1,501 526,129,501
4 Enhertu 108 810 491,509,195
5 Phesgo 203 1,675 459,505,618

FAQ

Answers to frequently asked questions about MDV’s real-world clinical data.

No. Our databases includes both inpatient and outpatient insurance claims data.
While there are approximately 8,000 hospitals in Japan, 1,685 hospitals (roughly 20%) are designated as DPC hospitals as of June 2026.
DPC stands for Diagnosis Procedure Combination. Unlike the traditional fee for service reimbursement model, the DPC system is a flat sum reimbursement scheme for inpatient care. Medical fees are calculated using fixed daily rates determined by the MHLW (Ministry of Health, Labour and Welfare), based on the patient’s diagnosis, disease severity, presence of surgery or complications, and details of the treatments provided.
Hospitals designated under the DPC system are also required to submit DPC data to the MHLW on a quarterly basis.
Yes. Through our Health Insurance Database, data from clinic visits are also available. Beside providing insurance claim data from DPC hospitals, MDV is also supplying data from the Health Insurance Societies and National Health Insurance thanks to partnership with external providers.
Each DPC hospital assigns a unique ID to each patient, so it is possible to track both inpatient and outpatient visits within the same DPC hospital, but it is not possible to track patients after they have been transferred to another hospital.

CONTACT US

For any questions about our RWD services or clinical databases, please feel free to get in touch.

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