Japanese for Technical Interns and Factory Work

A factory in Japan speaks a small, fast language, and most of it is about safety, quantity, and confirmation. This guide gives a technical intern the lines the floor says every day, from the morning meeting to the dormitory bath rota, and the words that must be understood before there is time to translate.

Factory workers in caps and gloves pointing at a machine during a morning safety check
What you need to know

Japanese for Technical Interns and Factory Work

You arrive as a skilled adult who knows how to work; what you do not yet have is the Japanese the line runs on. A team leader will not explain a machine across the noise of a press. He will say two words and expect two back. This guide covers the safety words that must stop your hands, the hazard-prediction habit called KY, the morning meeting, general machine and process vocabulary, confirming an instruction by repeating it, reporting a defect or a fault at once, asking to be shown again, break and shift phrases, the dormitory, and the respect words toward a senior worker.

Safety words are reflexes, so react to abunai, tomare, and sawaranaide before you translate them

Repeat every instruction back in your own words; the repeat is what tells the leader you understood

Report a defect or a strange noise at once, because a late report costs more than a wrong one

Polite forms upward and a loud, clear hai are what a senior worker notices first about you

The safety words that must stop your hands

Treat these as reflexes rather than vocabulary. When someone shouts abunai you stop your hands and step back before you know why, and when someone shouts tomare you stop the machine, the trolley, or your feet. The trap is the half-second of translation, so practise the sound until the reaction comes first. Say them yourself as well: if you see a sleeve near a roller, your abunai is as valid as the leader's, and nobody will tell you off for a false alarm. The blunt forms ending in na are commands shouted because there is no time for kudasai; they are not anger.

JapaneseReadingMeaningWhat to do
危ないabunaiDanger, look outStop your hands and step back
止まれtomareStopStop the machine, the trolley, or your feet at once
止めてtometeStop it, switch it offPress stop and keep your hands out
触らないでsawaranaideDo not touchHands off until the instruction comes
触るなsawaru naDo not touch (blunt)Same, shouted in an emergency
危険kikenDangerTreat the machine or area as live
注意chūiCautionSlow down and look before the next move
非常停止hijō teishiEmergency stopThe red button; press it when someone is in danger
手を出すなte o dasu naKeep your hands outDo not reach into the machine
巻き込まれ注意makikomare chūiCaution, entanglementKeep sleeves, gloves, and hair away from rollers
挟まれ注意hasamare chūiCaution, pinch pointKeep fingers clear of the press or door
高温注意kōon chūiCaution, hot surfaceDo not touch without heat gloves
離れてhanareteMove awayStep back from the machine or load
立入禁止tachiiri kinshiNo entryStay outside the marked line
火気厳禁kaki genkinNo open flamesNo smoking, no grinding, no sparks here

Kiken and chūi appear on signs and on the machines themselves, often on a yellow label next to the part that bites. On your first day walk the line and read each label aloud. When you warn a colleague outside an emergency, use the polite forms: sawaranaide kudasai, hairanaide kudasai. In an emergency use the short ones and use them loudly.

The KY habit and pointing and calling

Most factories run a short hazard-prediction routine before work, called KY from kiken yochi. The group looks at the task, names the dangers in it, and names the action that prevents each one. It ends with pointing and calling, yubisashi koshō: you point at the guard, look at it, say its name, and shout yoshi. This is not theatre. Saying it aloud stops your hands from moving on habit. In the first week you will mostly listen and answer yoshi; by the second month you may be asked to name a danger yourself, so learn the pattern of the sentence now.

JapaneseRomajiMeaning
今日のKYを始めます。Kyō no kei wai o hajimemasu.We will begin today's hazard prediction.
どんな危険がありますか。Donna kiken ga arimasu ka.What dangers are there?
手を挟まれる危険があります。Te o hasamareru kiken ga arimasu.There is a danger of getting a hand caught.
手を入れないようにします。Te o irenai yō ni shimasu.I will make sure not to put my hand in.
安全カバー、ヨシ。Anzen kabā, yoshi.Safety guard, check.
手元、ヨシ。Temoto, yoshi.Hands, check.
今日も安全に作業しよう、ヨシ。Kyō mo anzen ni sagyō shiyō, yoshi.Let's work safely today too, right.

The morning meeting and the day's instructions

The day usually starts with a chōrei, a short standing meeting. The leader gives the line assignments, the target quantity, yesterday's defects, and any change to the process. You will not understand every sentence for weeks, but the shape repeats, and three things matter: which line you are on, how many pieces, and by when. Listen for those numbers, and if one is missing ask for it at the end when the leader says nani ka shitsumon wa arimasu ka. A question at the meeting is normal; a wrong quantity at three o'clock is not.

JapaneseRomajiMeaning
おはようございます。Ohayō gozaimasu.Good morning.
今日の作業を説明します。Kyō no sagyō o setsumei shimasu.I will explain today's work. (what you hear)
今日は二番ラインです。Kyō wa niban rain desu.Today you are on line two.
目標は千個です。Mokuhyō wa sen-ko desu.The target is one thousand pieces.
昨日、不良が三つ出ました。Kinō, furyō ga mittsu demashita.Yesterday there were three defects.
何か質問はありますか。Nani ka shitsumon wa arimasu ka.Any questions?
一つ、質問があります。Hitotsu, shitsumon ga arimasu.I have one question.
はい、わかりました。Hai, wakarimashita.Yes, understood.
今日もよろしくお願いします。Kyō mo yoroshiku onegai shimasu.Please guide me today as well.

Machine and process words in general terms

Every factory has its own product names, but the general words for machines, parts, and steps are shared, and they are the ones pointed at you with a finger. Many are loanwords with a Japanese pronunciation you may not catch at first: konbea for conveyor, suitchi for switch. Learn the pair of words for good and defective items early, ryōhin and furyōhin, because inspection is where new workers are judged. The five words of 5S, the tidiness system most plants use, also appear on the wall and in the meeting, so know them by sight.

JapaneseReadingEnglish
機械kikaimachine
ラインrainproduction line
部品buhinpart, component
製品seihinproduct
材料zairyōraw material
工程kōteiprocess step
組み立てkumitateassembly
加工kakōmachining, processing
溶接yōsetsuwelding
塗装tosōpainting, coating
検査kensainspection
良品ryōhingood item, pass
不良品furyōhindefective item
数量sūryōquantity
治具jigujig, fixture
katamould, die
電源dengenpower supply
スイッチsuitchiswitch
コンベアkonbeaconveyor
フォークリフトfōkurifutoforklift
台車daishatrolley
手袋tebukurogloves
保護メガネhogo meganesafety glasses
安全靴anzengutsusafety shoes
整理・整頓・清掃・清潔・躾seiri, seiton, seisō, seiketsu, shitsukethe 5S: sort, set in order, shine, standardise, sustain

Confirm an instruction by repeating it back

Japanese workplaces expect fukushō, repeating an instruction back, and a new worker who does it is trusted faster than one who nods. The form is simple: take the leader's sentence, change the request ending to a plain masu form, and say it with the numbers. Kensa shite kudasai becomes kensa shimasu. Then add the one thing you are unsure of as a question with ne or ka. The reply you will hear is a short sō, sō or hai, onegai, and that is your permission to start. If the reply is a correction, repeat the corrected version too.

JapaneseRomajiMeaning
この部品を百個、検査してください。Kono buhin o hyakko, kensa shite kudasai.Inspect one hundred of this part. (what you hear)
はい、この部品を百個、検査します。Hai, kono buhin o hyakko, kensa shimasu.Yes, I will inspect one hundred of this part.
三時までですね。San-ji made desu ne.By three o'clock, right?
こちらの箱に入れますか。Kochira no hako ni iremasu ka.Do I put them in this box?
復唱します。Fukushō shimasu.I will repeat that back.
確認させてください。Kakunin sasete kudasai.Let me confirm.
終わったら報告します。Owattara hōkoku shimasu.I will report when it is done.

The mistake learners make is to repeat only hai. Hai alone tells the leader you heard a voice; the numbers tell him you heard the instruction. If you did not catch the quantity, say the rest and leave a question where the number was: nan-ko desu ka.

Reporting a defect or a machine problem at once

Japanese companies teach hōrensō, a set of three habits: hōkoku, reporting; renraku, keeping people informed; and sōdan, consulting before deciding. On the line the first one matters most, and it has a time limit. A scratched part reported now is one part; the same scratch reported after lunch is a batch. The same applies to the machine. A strange noise, an error on the display, a part that jams: stop, do not fix it yourself, and report it with three pieces of information, where, what, and whether you touched it. The reply will usually be a question or a wait there, so stay by the machine.

JapaneseRomajiMeaning
すみません、報告があります。Sumimasen, hōkoku ga arimasu.Excuse me, I have something to report.
不良品が出ました。Furyōhin ga demashita.A defective item has come out.
傷があります。Kizu ga arimasu.There is a scratch.
寸法が違います。Sunpō ga chigaimasu.The dimensions are wrong.
三番機で、部品が詰まりました。Sanban-ki de, buhin ga tsumarimashita.On machine three, a part has jammed.
機械が止まりました。Kikai ga tomarimashita.The machine has stopped.
変な音がします。Hen na oto ga shimasu.It is making a strange noise.
エラーが出ています。Erā ga dete imasu.An error is showing.
触っていません。Sawatte imasen.I have not touched it.
部品が足りません。Buhin ga tarimasen.We are short of parts.
どうすればいいですか。Dō sureba ii desu ka.What should I do?

Asking to be shown again without losing face

The fear of asking twice is the biggest single cause of wasted parts among new workers, and it is a fear the seniors do not share. A demonstration takes a minute; a wrong batch takes an afternoon. The polite way to ask is to request the demonstration, not to confess ignorance: mō ichido misete moraemasu ka puts the focus on the task. Add yukkuri onegai shimasu if the first demonstration was fast, and ask to try it yourself once while the senior watches. Then close with a short thank you and repeat the steps back in order.

JapaneseRomajiMeaning
もう一度、見せてもらえますか。Mō ichido, misete moraemasu ka.Could you show me once more?
ゆっくりお願いします。Yukkuri onegai shimasu.Slowly, please.
順番を教えてください。Junban o oshiete kudasai.Please tell me the order of the steps.
ここまでは合っていますか。Koko made wa atte imasu ka.Is it right up to here?
一度、やってみてもいいですか。Ichido, yatte mite mo ii desu ka.May I try it once?
メモしてもいいですか。Memo shite mo ii desu ka.May I take notes?
ありがとうございます。わかりました。Arigatō gozaimasu. Wakarimashita.Thank you. I understand now.

Asking a fellow intern instead of the senior feels safer and is usually worse, because you both learn the same mistake. Ask the person who showed you, and ask on the same day.

Break and shift phrases

A line cannot stop because one person walked away, so breaks and handovers are announced, not taken. Tell the leader when you go and when you are back, and hand over the state of your station in one sentence. Shift words matter for your own schedule too: nikkin and yakin, day and night shifts, and zangyō, overtime, which is often asked as a question you are allowed to answer honestly. The end of the day has its fixed pair: osaki ni shitsurei shimasu from the person leaving, otsukaresama desu from everyone still there.

JapaneseReadingMeaningWhen you say it
休憩に入ります。Kyūkei ni hairimasu.Going on break.To the leader before you leave your station
休憩から戻りました。Kyūkei kara modorimashita.Back from break.As you return, before you restart
交代します。Kōtai shimasu.Taking over.When you relieve someone at a station
引き継ぎをお願いします。Hikitsugi o onegai shimasu.Please hand over to me.At a shift change, asking for the state of the station
日勤です。Nikkin desu.I am on the day shift.Answering a question about your schedule
夜勤です。Yakin desu.I am on the night shift.The same, for nights
今日は残業できますか。Kyō wa zangyō dekimasu ka.Can you do overtime today?What the leader asks
はい、できます。Hai, dekimasu.Yes, I can.Accepting the overtime
すみません、今日は難しいです。Sumimasen, kyō wa muzukashii desu.Sorry, today is difficult.Declining politely
体調が悪いので、早退してもいいですか。Taichō ga warui node, sōtai shite mo ii desu ka.I feel unwell; may I leave early?To the leader, as early as possible
明日は休みです。Ashita wa yasumi desu.I am off tomorrow.Reminding the leader of your day off
お先に失礼します。Osaki ni shitsurei shimasu.I am leaving before you.As you leave the floor
お疲れ様です。Otsukaresama desu.Thanks for your work.To anyone leaving, and as a general greeting

Dormitory and daily-life phrases

Many interns live in a company dormitory, a ryō, and the rules there are as fixed as the ones on the line: rubbish days, bath hours, quiet hours, and who to ask. The person to ask is usually a dormitory manager or a life-support contact from your supervising organisation, and the most useful sentence you own is sōdan ga arimasu, I have something to discuss, because it opens a conversation about money, health, or a problem with a colleague without having to explain the whole thing in the first breath.

JapaneseRomajiMeaning
ゴミは何曜日ですか。Gomi wa nan-yōbi desu ka.Which day is rubbish collection?
お風呂は何時までですか。Ofuro wa nan-ji made desu ka.Until what time can we use the bath?
洗濯機を使ってもいいですか。Sentakuki o tsukatte mo ii desu ka.May I use the washing machine?
すみません、静かにします。Sumimasen, shizuka ni shimasu.Sorry, I will keep it quiet.
明日、病院に行きたいです。Ashita, byōin ni ikitai desu.I want to go to the hospital tomorrow.
送金したいのですが。Sōkin shitai no desu ga.I would like to send money home.
相談があります。Sōdan ga arimasu.I have something to discuss.
給料の明細を確認してもいいですか。Kyūryō no meisai o kakunin shite mo ii desu ka.May I check my pay slip?

Respect words toward a senior worker

The floor has its own titles, and using them correctly is the cheapest respect you can pay. A senpai is anyone who joined before you; a shidōin is the instructor assigned to you; a hanchō leads a team; above that sit the shunin, the kakarichō, and the kachō, and you will hear all of them addressed by title alone. Use the family name plus san for colleagues, the title alone for leaders, and never your own san. The senior's reply to your thanks is often a brisk ii yo, and that is not coldness; it is how a senior accepts thanks on a line.

JapaneseRomajiMeaning
田中さん、教えてください。Tanaka-san, oshiete kudasai.Tanaka-san, please teach me.
班長、確認をお願いします。Hanchō, kakunin o onegai shimasu.Team leader, please check this.
先輩のおかげです。Senpai no okage desu.It is thanks to you, senpai.
勉強になりました。Benkyō ni narimashita.I learnt a lot from that.
手伝いましょうか。Tetsudaimashō ka.Shall I help?
いいよ。Ii yo.It's fine. (casual, what a senior replies)

Teach yourself to hear plain-form instructions without flinching. Yatte, motte kite, and mite are how a senior speaks to a junior he trusts, and answering them with a polite hai, yarimasu is exactly the register the floor expects.

The programme, and a first-month speaking plan

Technical intern training and the newer specified-skills routes both bring skilled workers to Japanese factories, and both usually involve a supervising or support organisation, a set contract period, and a Japanese language requirement at some stage. The details change, and they differ by sector, so confirm the current rules, your rights, and who to call in a problem with your supervising organisation or employer rather than with a forum. What does not change is the language of the shift, and the plan below gets ahead of it before the line teaches it to you by embarrassment.

  • Week one: the fifteen safety words and the KY replies, said at full volume with the pointing gesture, until they need no thought
  • Week two: the machine and process table said aloud as you touch each object, plus one repeated-back instruction every day
  • Week three: three defect reports and three machine reports rehearsed in the where, what, touched-or-not order
  • Week four: the break, shift, and dormitory phrases used for real, then a recording of yourself checked for volume and clarity
Key points

A practical way to improve

Say the fifteen safety words in the table aloud at full volume, pointing at an imaginary machine each time, until the meaning arrives with the sound. Then take the workplace-call mission with your AI Sensei in Unihongo's immersive 3D classroom and report that machine three has stopped with a strange noise: where, what, and that you have not touched it, in three short sentences. Read the session report afterwards and note every line you softened, because on a line the softened version is the one that gets lost in the noise.

  1. 1

    Choose one clear goal

    Focus each session on a situation or skill you can actually use.

  2. 2

    Practice actively

    Say complete answers aloud instead of only reading or recognizing Japanese.

  3. 3

    Review and repeat

    Keep useful corrections and revisit the same skill until it feels natural.

FAQ

Frequently asked questions

How much Japanese do I need before starting factory work in Japan?

You need the safety words and the standard replies perfectly, the morning meeting routine, and enough polite Japanese to repeat an instruction back and ask for it again. The rest can be learnt on the line. Technical intern and specified-skills routes usually involve a Japanese language check at some stage, so confirm the current requirement with your supervising organisation or employer before you rely on any figure.

What is KY on a Japanese factory floor?

KY stands for kiken yochi, hazard prediction. Before a task, a small group names the dangers in it and the action that prevents each one, then confirms with a pointed finger and a loud yoshi. It is a short routine, usually a few minutes, and taking it seriously is read as a sign of a serious worker.

Is it embarrassing to ask a senior to show me again?

No. On a line the embarrassing thing is to nod, make a hundred wrong pieces, and have the inspection find them. Asking mō ichido misete moraemasu ka and repeating the steps back is the professional choice, and most seniors would rather be asked twice than fix a batch.

Should I use casual Japanese because my seniors do?

Listen to casual forms so that you understand them, because instructions will often arrive in plain form, but answer in polite form. Hai, wakarimashita, and sumimasen, mō ichido onegai shimasu work with everyone from a fellow intern to the section manager. Casual forms upward are noticed, and not kindly.

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