How to call a Japanese supplier when you don't speak Japanese
You found the factory on Alibaba. You emailed them in English. They replied — politely, in stilted English — and asked you to call. Now what?
Japanese B2B is still phone-first. Even in 2026, most Japanese factories and trading houses treat a phone call as a more serious signal of intent than an email — especially for first-time enquiries, custom orders, or anything involving negotiation. Many will ghost an email but answer a phone.
The catch: most of the people who pick up the phone at a Japanese factory speak limited English. Their English is usually readfluently (they handle a lot of English email) but spokenconversation is harder, especially under time pressure with a stranger on the line.
You have three options. Hire a freelance Japanese-speaking sourcing agent ($300–$1500 per supplier engagement). Use an on-demand human interpreter dial-in service like LanguageLine ($1.50–$5/minute, requires booking, 1–5 minute pickup latency). Or use a real-time AI phone interpreter like Voixet ($0.60/minute, no booking, starts instantly). This article assumes you're going with option three — and walks through how to make that first call land.
1. Time the call right
Japan is UTC+9. There's no daylight saving. Business hours at factories and trading houses are usually 09:00 to 18:00 JST, Monday through Friday. Many smaller factories close Saturday, virtually all close Sunday.
The best windows to call:
- 10:00–11:30 JST — people have settled in, coffee is poured, no one is hungry yet
- 14:00–16:00 JST — post-lunch lull, still well before end-of-day
Avoid: 12:00–13:00 (lunch), the last 30 minutes of the workday (people are wrapping up and politely impatient), the first day back after Obon (mid-August), Golden Week (late April through early May), and the week between Christmas and the first working day of January (年末年始).
2. Have your opening 30 seconds written down
When AI is translating, your delivery improves dramatically if you read the first few lines from a script. This isn't about not knowing what to say — it's about giving the translation engine (and the recipient) clean, fluent English to work with for the highest-stakes moment of the call.
A solid opening:
“Hello, this is [your name] from [your company] in [your country]. We're a [one-line description — e.g. boutique homeware retailer]. We've seen your [product line] on [Alibaba / your website / a trade show] and we'd like to discuss the possibility of ordering [rough quantity range]. May I speak with someone in sales or export?”
This gives the receptionist (and the AI) enough context to route you to the right person without you needing to improvise in the first 10 seconds. The phrase “ordering [quantity range]” signals you're serious commercially, which gets you transferred out of the general line and into actual sales.
3. Expect a 2–3 second pause before the first reply
The first response from the Japanese end of the call is almost always slower than the responses that follow. Three things are happening simultaneously:
- The receptionist is processing “I just heard a translated voice, not a person speaking Japanese natively”
- They're deciding whether you sound legitimate or like a scam
- They're looking for the right person internally to route you to
Don't fill the silence by repeating yourself — that confuses the recipient and the translation engine. Wait. Three seconds feels long when you're holding a phone but it's the right behaviour.
Once the conversation gets rolling, response times normalise to 1–2 seconds for translation latency plus whatever the human takes to think, which is the same as a natural in-language call.
4. Treat the bilingual transcript as your call record
A real-time AI call produces a synchronized two-column transcript (original Japanese on one side, your English translation on the other). Save it. Send a follow-up email within 24 hours summarising what was agreed, with timestamps referencing the transcript.
Japanese business correspondence places enormous weight on written records. By sending the follow-up with specifics, you:
- Surface any translation errors before they harden into misunderstandings
- Give the supplier a written reference they can route internally to whoever needs to act
- Demonstrate seriousness and professional process — a strong signal in Japanese B2B
A useful template: “Following our call at [time] today, here is my understanding of what we discussed. Please correct anything I got wrong before I proceed.” This invites graceful correction rather than confrontation, which is how Japanese business prefers to surface disagreements.
5. What to do when the call goes off-script
Common off-script moments and how to handle them:
- They ask you to call back later
- Confirm a specific time in their local time zone. “Could I call you back at 14:00 your time tomorrow?” — get an explicit yes. Otherwise, you'll call back and find they forgot.
- They ask for an email address to send a catalogue to
- Don't spell out an email letter-by-letter over a live translation channel — names get mangled. Instead say “I will send you a confirming email immediately after this call.” Then send it within 5 minutes.
- They say “chotto muzukashii” (a bit difficult)
- The translation will say “a bit difficult” but the cultural meaning is almost always “no.” Don't push. Ask what would need to change to make it possible — that gives them a graceful way to either explain the real obstacle or close the door without losing face.
- They speak too quickly and the translation lags
- Politely ask them to slow down: “Could you speak a little more slowly? Our connection is translating in real time.” Most Japanese business speakers will accommodate immediately once they understand the constraint.
Frequently asked questions
- Will the Japanese factory accept a call from a foreign caller ID?
- Yes, in almost every case. Japanese business landlines accept international calls by default. If your caller ID looks unfamiliar (e.g. a US +1 number), the recipient may ask who is calling — Voixet will translate that question into English in real time so you can answer.
- What time is best to call a Japanese supplier?
- Japan business hours are typically 09:00–18:00 JST (UTC+9), Monday to Friday. Avoid calling 12:00–13:00 (lunch) and 17:30 onwards (people start leaving). For best response, call between 10:00 and 11:30 JST or 14:00 and 16:00 JST. Many smaller factories close on Saturday and most close on Sunday.
- How do I phrase my opening line politely in Japanese business culture?
- A safe opening: "Hello, this is [your name] from [your company] in [your country]. We are interested in your [product]. May I speak with someone in sales or export?" Voixet will translate this into appropriately polite business Japanese. Stay calm even if there is an awkward pause — the recipient may need a moment to register that they are hearing translated English.
- What if the supplier asks for documents during the call?
- Voixet generates a bilingual transcript of the entire call. After hanging up, you can review exactly what was promised, what email address was given, and what specifications were discussed. Follow up the call with an email referencing the transcript timestamps so both sides have a written record.
- Can I use Voixet to call Japanese mobile phones, not just landlines?
- Yes. Voixet places calls to any Japanese phone number — landline (03-, 06-, etc.), mobile (080-, 090-, 070-), or toll-free. The recipient experience is identical: they pick up a normal call and hear your translated voice.
Try it on your first call
New Voixet accounts get 3 minutes free, no credit card required. Enough to dial a single supplier, run through the opening 30 seconds, and get a feel for how the translation lands before committing to anything.