The most common Riken email format is {f}{last}@riken.jp (e.g. jdoe@riken.jp), used in about 84% of observed Riken work emails. Riken uses 6 address formats in total.
Most likely format — based on 592 observed addresses
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Riken email formats
84.3% of observed Riken addresses use the {f}{last}@ format.
Email formatExampleShare
{f}{last}@riken.jp
Examplejdoe@riken.jp
Share84.3%
{first}.{last}@riken.jp
Examplejane.doe@riken.jp
Share14.4%
{last}@riken.jp
Exampledoe@riken.jp
Share0.7%
{first}{last}@riken.jp
Examplejanedoe@riken.jp
Share0.3%
{last}.{first}@riken.jp
Exampledoe.jane@riken.jp
Share0.2%
{first}@riken.jp
Examplejane@riken.jp
Share0.2%
Derived from 592 real observed addresses · data refreshed 2026-05-30. Role-based inboxes (info@, sales@, …) are excluded from format detection.
Verify the pattern before you send
Start with the format that appears most often. For Riken, that means testing {f}{last}@riken.jp first, then verifying the exact address before it reaches your CRM or sequencer. A pattern can be common and still produce bad guesses when a person uses a nickname, a middle initial, a regional mailbox, or an older alias.
VeriMails checks syntax, MX records, SMTP behavior, disposable domains, and catch-all detection so you can keep valid addresses and skip risky ones. For larger files, credits start at $19 for 10,000 verifications and never expire. Create a free account, test the pattern on a few addresses, then buy more credits only when you need volume. Run the check again before a large campaign if the list is old, because domains change mail routing and people leave.
The most common Riken email format is {f}{last}@riken.jp (for example jdoe@riken.jp), used in about 84% of observed Riken work addresses. Riken also uses 5 other formats for name collisions.
How accurate is this Riken email format?
This format is derived from 592 real Riken addresses observed across our data, not guessed. To confirm a specific address, use the live verifier above — it checks deliverability in real time.
How do I find and verify a specific person's Riken email?
Apply the most common pattern to the person's name (e.g. jdoe@riken.jp), then verify it on this page — or use the Find tab to get the likely address from their name automatically.
What other email formats does Riken use?
Beyond {f}{last}@riken.jp, observed formats include {first}.{last}@riken.jp, {last}@riken.jp, {first}{last}@riken.jp, {last}.{first}@riken.jp, {first}@riken.jp, in descending order of frequency.
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