Company lists · Data refreshed September 2026

Top 19 Oncology companies based in Japan

RevenueBase identified 43 company matches for oncology companies associated with Japan as of September 2026 and tracks 10,001 professional contacts across them, including 4,415 with verified work emails. Tokyo is the largest hub.

This list covers company matches for oncology companies associated with Japan, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed September 20, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.

How to read this list RevenueBase SmartSearch · Exact Recorded Sep 20, 2026 How this list was built
43Companies
10,001Contacts tracked
4,415Verified emails
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The 19 largest oncology companies based in Japan

Ranked by team size
Top 19 of 43 company matches for oncology companies based in Japan, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 20, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#CompanyRevenueBase SmartSearchHeadquartersEmployeesContacts
1Exact matchChuo-ku, JapanHQ recorded Sep 20, 202610001+6,426 contacts →

Exact match

“Astellas is a global life sciences company committed to turning innovative science into VALUE for patients.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
2Exact matchTokyo, JapanHQ recorded Sep 20, 202610001+1,491 contacts →

Exact match

“Daiichi Sankyo is an innovative global healthcare company contributing to the sustainable development of society that discovers, develops, and delivers new standards of care to…”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
3Exact matchMinato-ku, JapanHQ recorded Sep 20, 20261,001-5,000556 contacts →

Exact match

“Fujirebio is a world leading in vitro diagnostics (IVD) company and innovation-driven content provider, enabling breakthrough diagnostic solutions to reach patients worldwide…”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
4Exact matchOsaka, JapanHQ recorded Sep 20, 2026501-1,000287 contacts →

Exact match

“Linical is a global Contract Research Organization (CRO) for full-service drug development, with a proven record of helping biopharmaceutical companies successfully navigate the…”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
5Exact match大阪市中央区, JapanHQ recorded Sep 20, 20261,001-5,000184 contacts →

Exact match

“This is the official company page of Sumitomo Pharma Co, Ltd.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
6Exact matchMinato-ku, JapanHQ recorded Sep 20, 202651-200129 contacts →

Exact match

“Micron Inc, the leading Japanese imaging CRO, was established in 2005 with expertise in the field of molecular imaging.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
7Exact matchMinato-ku, JapanHQ recorded Sep 20, 202611-5018 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
8Exact match江東区, JapanHQ recorded Sep 20, 202611-5015 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
9Exact matchMinato-ku, JapanHQ recorded Sep 20, 202611-5014 contacts →

Exact match

“From its establishment in 2005, J-Pharma, a clinical stage bio-venture company with a special focus on membrane transporters, has been conducting an array of unique drug…”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
10Exact match千代田区, JapanHQ recorded Sep 20, 202651-20012 contacts →

Exact match

“N-nose (20199) 570”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
11Exact matchFujisawa, JapanHQ recorded Sep 20, 202611-5011 contacts →

Exact match

“Chordia Therapeutics is a clinical-stage biotech company engaged in the research and development of novel therapies for cancers with high unmet medical needs.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
12Exact matchMinato, JapanHQ recorded Sep 20, 202611-5011 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
13Exact match中央区, JapanHQ recorded Sep 20, 202651-2009 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
14Exact matchMatsumoto, JapanHQ recorded Sep 20, 202611-505 contacts →

Exact match

“A-SEEDS, an innovative biotech company sprouted from Shinshu University, is dedicated to pioneering advanced treatments for life-threatening cancers.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
15Exact matchKyoto, JapanHQ recorded Sep 20, 202611-504 contacts →

Exact match

“Recent development of engineered T cell therapies has demonstrated remarkable efficacy and brought hope to cancer patients.”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
16Exact matchTokyo, JapanHQ recorded Sep 20, 20261-103 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
17Exact match府中市宮町, JapanHQ recorded Sep 20, 20261-103 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
18Exact matchTokyo, JapanHQ recorded Sep 20, 20261-103 contacts →

Exact match

“We are a clinical stage biopharmaceutical company aspiring to cure solid tumors with our novel TCR like CAR-T cell therapies that enhances the immune system with state of the art…”

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
19Exact matchFukuoka, JapanHQ recorded Sep 20, 20261-101 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase

Showing 19 of 43 oncology companies based in Japan

See the full list, filter by size, metro and specialty, and access 4,415 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Oncology companies based in Japan at a glance

As of Sep 20, 2026
44.1%Verified-email coverage
232.6Average contacts per company
11-50Median size (employees)
34.9%Largest-city concentration · Tokyo
Sep 20, 2026Page data refreshed

Companies by employee count

1-10
15
11-50
13
51-200
7
501-1,000
2
1,001-5,000
2
5,001-10,000
1
10001+
2

Email recency for this list is measured worldwide rather than for Japan, so it is reported there. Company counts and contact totals on this page are exact for Japan, over 43 companies.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

Source
The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
What qualifies
Company records associated with Japan whose business descriptions match “oncology companies” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch
Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview
The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality
RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
Ranking
Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
Verification
Every displayed company carries at least one verified work email. RevenueBase tracks 4,415 professional contacts with verified work emails across the full matched dataset. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
Refresh
This page's figures were pulled from the company graph on September 20, 2026. Lists refresh periodically as the graph is re-checked.
Record context
Company records and descriptions can change. Check the company's website for its current services and locations.

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “oncology companies”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many oncology companies are there based in Japan?

RevenueBase identified 43 company matches for oncology companies associated with Japan as of September 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

Astellas Pharma tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most oncology companies?

Tokyo leads with 15 company records, followed by Jing (4) and Kawasaki (2).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 4,415 professional contacts with verified work emails tracked across these 43 companies; direct dials are available where recorded.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 20, 2026.

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About this data

RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase SmartSearch, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.