6 Best Email Finder Tools for Japan in 2026

An email finder for Japan returns a work email for a person in Japan, from a name, a domain or a profile. Sales teams, recruiters and data engineers who sell into Tokyo, Osaka and Nagoya need one that holds those people. Most vendors print one global total and leave Japan to the buyer.

Coverage is the only criterion on this page. A tool can have the best price and the best API and still return nothing for a section manager in Osaka. None of the six prints a Japan figure that we could find, so each section gives a test you can run on your own contacts.

We ran one count ourselves: LeadOcean, on 2026-10-21, free. Read the rivals on their own pages: Lusha, Apollo, ContactOut, Hunter and Prospeo. For the basics, see what is an email finder. For the UK, see best email finder tools for the UK.

TL;DR

"1M records" means 1M work-email lookups that return a result, at list price. Prices are monthly list first, billed-yearly figure after it, checked September 2026.

What we evaluated

• Published Japan coverage: a figure for Japan alone, with a source we can link.
• Free coverage test: whether you can size Japan, or test your own contacts, before you pay.
• Location filter: whether you can search by the person's country or city, not only the company's headquarters.
• API and MCP: whether a script or an agent can pull Japan emails directly.
• Price at volume: flat, credits, seats or quote, and what 1M lookups cost.

We ran no hit-rate test on the rivals, so we print none for them. Vendor figures are vendor claims, and each vendor counts a "contact" its own way. None of the pages we read says how well a tool handles Japanese-script names, so test that yourself.

How to run the coverage test

Take 25 contacts you really sell to in Tokyo, Osaka, Nagoya and Fukuoka. Use your own list, not ours. Include a few at small firms and a few whose names you hold only in Japanese script, because that is where every database thins out.

Run them through each free tier below and count how many return a work email. Free tiers are enough: Lusha Free gives 40 credits a month, Apollo 75, Hunter 50, Prospeo 100 and LeadOcean 1,000 records, one-off. ContactOut gives 5 emails a day.

1. LeadOcean: best for API, agent and volume buyers

LeadOcean holds 693M people and 67M companies. Its country filter takes 254 codes and its city filter takes city names. We ran count_leads for Japan (country: JP) on 2026-10-21, which spends no records. By default it counts people with a verified, catch-all-valid or catch-all email status.

Japan returns 330,993 mailable people across 39,621 distinct companies. With no email condition the same filter matches 1,757,258 people, so about 19% of Japan is mailable. Counting only the verified status gives 115,646. A phone is held for 146,796 people, about 8%, counted across any email status.

Tokyo is 102,227 of the mailable people (432,759 with no email condition). C-Team is 33,225 mailable, of 140,820 across all statuses. Each count is a separate filter on the same query, so the groups overlap.

Here is the weak point: Japan is a small slice of a 693M database, and four in five Japanese records have no mailable email. If your list is mostly Japan, size it before you buy. The REST call below does it for free, with count=true as a query parameter.

curl -X POST "https://api.leadocean.io/v1/people/search?count=true&limit=1" \
  -H "x-api-key: $LEADOCEAN_API_KEY" \
  -H "content-type: application/json" \
  -d '{"country": ["JP"], "city": ["Tokyo"], "emailStatus": ["verified", "catch_all_valid", "catch_all"]}'

Over REST, meta.total stops at 100,000, so use narrow filters or the MCP tool leadocean_count_leads for exact totals. The MCP server at https://api.leadocean.io/mcp has 13 tools and signs in with OAuth 2.1.

Japan coverage test. Count your target titles in Japan with count_leads, which is free and exact. Then spend a few of the 1,000 free records on your own 25 contacts and read email_status on each result. A miss on POST /v1/people/enrich costs nothing. For the full method, see the Japan accuracy test.

Pros

• A free, exact Japan count by city, title, level and function, with email status and phone filters.
• Agency is $497 a month flat, with 200 requests a second and no per-record price.
• REST and MCP on every plan, including Free.
• Search by the person's country, city, title, seniority and industry in one call.

Cons

• Japan is thin: 330,993 mailable people, and about 1 in 5 Japan records has a mailable email.
• No rep workspace, sequencer, dialer or CRM.
• Free is 1,000 records, one-off, and bulk CSV export is not on Free.

Best for: engineers, agencies and agents that pull Japan lists alongside other markets and want a fixed bill.

Pricing: Free $0, 1,000 records for life. Solo $97 a month. Agency $497 a month. Platform $1,997 a month (LeadOcean pricing, October 2026).

2. Lusha: best for small Japan batches with phones

Lusha prints no Japan figure. Its data page lists 515M+ contacts, 29M+ companies and 165M+ verified emails worldwide, with no country table (Lusha data, October 2026).

Lusha says its coverage is stronger in English-speaking markets, and that phone coverage varies by country (Lusha knowledge hub, September 2026). An email costs 1 credit and a phone 5 (Lusha API docs, September 2026).

Japan coverage test. Lusha Free gives 40 credits a month, enough for 25 Japan work emails and 3 phones. The Prospecting API takes a countries filter and returns previews with a per-result charge (Lusha prospecting docs, September 2026). The MCP server has 50 tools and shares the API credit pool (Lusha MCP docs, September 2026).

Pros

• Phones and emails in the same lookup.
• Every plan includes an API key, Free included.
• MCP server with 50 tools.

Cons

• Credits run out fast at volume, and there is no public 1M price.
• No Japan figure, and a stated tilt toward English-speaking markets.
• Free and Starter API keys stop at 40 requests a minute and 100 a day.

Best for: teams that look up Japan contacts in small batches and want phones in the same tool.

Pricing: Free $0 for 40 credits a month. Starter $49.90 a month ($37.45 billed yearly). Pro $69.90 ($52.45). Premium $399.90 ($299.95) (Lusha pricing, September 2026).

3. Apollo: best for a free Japan count plus sequences

Apollo prints no Japan figure that we could find. Its data page lists worldwide totals with no country split (Apollo, September 2026). You can measure Japan yourself, because people search costs 0 credits and returns a total_entries count (Apollo API docs, September 2026).

Filter with person_locations[], which takes cities and countries. The search shows at most 50,000 records, 100 a page. An email costs 1 credit and a phone 8, and credits are per seat (Apollo API pricing, September 2026).

Japan coverage test. Apollo Free gives 75 credits a month and an API key. Search person_locations[] for Japan, Tokyo and Osaka, read total_entries, then spend credits on your own 25 contacts. The MCP server is at mcp.apollo.io and works on any plan (Apollo MCP docs, September 2026).

Pros

• A free, public way to count Japan people by location.
• Sequences, dialer and extensions on the same plan.
• Official MCP server on every plan.

Cons

• Credits are per seat, expire each cycle and do not roll over.
• A phone costs 8 credits, and 1M emails means 250 seats or more.
• Paid general endpoints allow 200 requests a minute and 2,000 a day on Basic and Professional.

Best for: reps who want a free Japan count and a sequencer in one app.

Pricing: Free $0 (75 credits a month). Basic $65 per seat a month ($49 billed yearly). Professional $99 ($79). Organization $149 ($119) (Apollo pricing, September 2026). 1M work emails is $24,750 a month at list on monthly billing, from 250 Professional seats.

4. ContactOut: best for profile-led lookups outside the US

ContactOut prints no Japan figure either. Its global totals disagree by page: 350 million professionals on the homepage, 800 million on the data page (ContactOut, September 2026). It sells a regional plan for contacts outside the US. Regional Email is $25 a month ($19 billed yearly) and Regional Email + Phone is $49 ($39), against $49 and $99 for global coverage (ContactOut pricing, September 2026).

That regional price is why it ranks here. For a small team that looks up Japan contacts one at a time from their profiles, it is the cheapest paid plan on this page. It is not a bulk source: self-serve fair use is 2,000 emails and 1,000 phones per account a month, with one user per company (ContactOut terms, September 2026).

Japan coverage test. ContactOut Free gives 5 emails, 5 phones and 5 exports a day, marked limited time. Run five of your own Japan contacts a day for a week and note the hit rate. API keys come from a sales meeting, with no public price (ContactOut API, September 2026). The MCP page shows 15 tools (ContactOut MCP, September 2026).

Pros

• Regional plans start at $25 a month ($19 billed yearly).
• Profile-led lookups for people outside the US.
• MCP server with 15 tools.

Cons

• No Japan figure, and the global profile total differs by page.
• 2,000 emails per account a month and one user per company.
• No public API price. People Search allows 60 requests a minute.

Best for: recruiters and small sales teams that look up Japan contacts one by one.

Pricing: Regional Email $25 a month ($19 billed yearly). Regional Email + Phone $49 ($39). Global Email $49 ($39). Global Email + Phone $99 ($79) (ContactOut pricing, September 2026).

5. Hunter: best for domain-first lookups

Hunter starts from a domain. Give it acme.co.jp and it returns the addresses it has found for that company. That works for Japan when you already hold the company list. It does not tell you how many Japanese people exist.

Its Discover endpoint filters companies by headquarters_location, and the value can be a continent, a business_region or a country (Hunter API docs, September 2026). That is the company's headquarters, not the person's location. A Tokyo office of a US company will not show up under Japan. We found no Japan coverage figure on the site.

Japan coverage test. Take 25 Japanese company domains and run Domain Search on Hunter Free, which gives 50 credits a month. Count how many domains return an address. An email lookup costs 1 credit, and nothing is charged when nothing is found (Hunter pricing, September 2026). The official MCP server is on every plan (Hunter MCP, September 2026).

Pros

• A published 1M price: $6,900 one-off on Data Platform.
• Official MCP server on all plans.
• Bulk Email Finder takes up to 50,000 rows per file.

Cons

• Domain-first: you need the Japanese company list before you find people.
• The location filter reads company headquarters, not where the person works.
• A rate-limited call returns 403, and a spent plan quota returns 429.

Best for: teams that already have Japanese company domains and need the addresses behind them.

Pricing: Free $0 (50 credits a month). Starter $49 a month ($34 billed yearly). Growth $149 ($104). Scale $299 ($209) (Hunter pricing, September 2026). On Data Platform, 1,000,000 search credits cost $6,900, one-off and valid 12 months (Hunter Data Platform, September 2026).

6. Prospeo: best for person-location search on a small budget

Prospeo searches by where the person is. Its search-person endpoint takes person_location_search and company_location_search, and the strings must match the ones the dashboard shows. You pull valid values from its Search Suggestions API (Prospeo API docs, September 2026). We found no Japan coverage figure.

A verified email costs 1 credit and a mobile 10, with email included. A search request that returns results costs 1 credit for up to 25 results, and a miss costs nothing (Prospeo credits, September 2026). Credits expire at the end of each cycle. The hosted MCP server has 8 tools (Prospeo MCP, September 2026).

Japan coverage test. Prospeo Free gives 100 credits a month. Search person_location_search for Japan and Tokyo, then enrich your own 25 contacts and count the verified emails. Enrich limits are 5 a second on Starter and Growth, and 30 a second on Pro (Prospeo rate limits, September 2026).

Pros

• Person-location and company-location filters in one search.
• You pay for verified emails, and misses are free.
• Per-credit price falls from $0.0245 on Starter to $0.0166 on Pro on monthly billing.

Cons

• Credits expire each cycle, and add-ons are a recurring subscription.
• Search API limits are 1 request a second on Starter and 5 on Pro.
• No single plan reaches 1M. The add-on slider ends at 350,000 credits a month, and larger add-ons are priced on request.

Best for: small teams that want person-location search and pay only for verified emails.

Pricing: per user a month, billed monthly: Free $0 (100 credits), Starter $49 (2,000), Growth $99 (5,000), Pro $249 (15,000). Billed yearly: $37, $74 and $187 a month (Prospeo pricing, September 2026). 1M lookups is $14,456 a month on monthly billing: 44 Pro seats at $249 plus the $3,500 add-on (Prospeo add-ons, September 2026).

Comparison table

How to choose

• Code, agents or volume: LeadOcean. Free exact counts for Japan by city and title, flat price, REST and MCP on every plan.
• Small batches with phone numbers: Lusha, after you confirm its Japan depth on the free tier.
• A free count plus a sequencer: Apollo, searched by person_locations[].
• Cheap one-by-one lookups outside the US: ContactOut Regional.
• You already hold Japanese company domains: Hunter, and a published $6,900 for 1M.
• Person-location search at small scale: Prospeo.
• Japanese-script names or small firms: none of these says it handles them. Run the 25-contact test on each free tier first.

Verdict

LeadOcean wins for API, agent and volume buyers. It gives a free exact Japan count by city, title and level, a flat $497 a month on Agency and an MCP server that returns records. It is thin in Japan, with 330,993 mailable people, so size your list before you buy. Lusha suits small batches with phones, Apollo for a free count and a sequencer, and ContactOut for cheap regional lookups. Hunter is the pick when you start from company domains, and Prospeo when you search by the person's location in small batches. Run the same 25 contacts through every free tier, then pay the one that finds the most.

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