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.
| Japanese | Reading | Meaning | What to do |
|---|---|---|---|
| 危ない | abunai | Danger, look out | Stop your hands and step back |
| 止まれ | tomare | Stop | Stop the machine, the trolley, or your feet at once |
| 止めて | tomete | Stop it, switch it off | Press stop and keep your hands out |
| 触らないで | sawaranaide | Do not touch | Hands off until the instruction comes |
| 触るな | sawaru na | Do not touch (blunt) | Same, shouted in an emergency |
| 危険 | kiken | Danger | Treat the machine or area as live |
| 注意 | chūi | Caution | Slow down and look before the next move |
| 非常停止 | hijō teishi | Emergency stop | The red button; press it when someone is in danger |
| 手を出すな | te o dasu na | Keep your hands out | Do not reach into the machine |
| 巻き込まれ注意 | makikomare chūi | Caution, entanglement | Keep sleeves, gloves, and hair away from rollers |
| 挟まれ注意 | hasamare chūi | Caution, pinch point | Keep fingers clear of the press or door |
| 高温注意 | kōon chūi | Caution, hot surface | Do not touch without heat gloves |
| 離れて | hanarete | Move away | Step back from the machine or load |
| 立入禁止 | tachiiri kinshi | No entry | Stay outside the marked line |
| 火気厳禁 | kaki genkin | No open flames | No 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.
| Japanese | Romaji | Meaning |
|---|---|---|
| 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.
| Japanese | Romaji | Meaning |
|---|---|---|
| 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.
| Japanese | Reading | English |
|---|---|---|
| 機械 | kikai | machine |
| ライン | rain | production line |
| 部品 | buhin | part, component |
| 製品 | seihin | product |
| 材料 | zairyō | raw material |
| 工程 | kōtei | process step |
| 組み立て | kumitate | assembly |
| 加工 | kakō | machining, processing |
| 溶接 | yōsetsu | welding |
| 塗装 | tosō | painting, coating |
| 検査 | kensa | inspection |
| 良品 | ryōhin | good item, pass |
| 不良品 | furyōhin | defective item |
| 数量 | sūryō | quantity |
| 治具 | jigu | jig, fixture |
| 型 | kata | mould, die |
| 電源 | dengen | power supply |
| スイッチ | suitchi | switch |
| コンベア | konbea | conveyor |
| フォークリフト | fōkurifuto | forklift |
| 台車 | daisha | trolley |
| 手袋 | tebukuro | gloves |
| 保護メガネ | hogo megane | safety glasses |
| 安全靴 | anzengutsu | safety shoes |
| 整理・整頓・清掃・清潔・躾 | seiri, seiton, seisō, seiketsu, shitsuke | the 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.
| Japanese | Romaji | Meaning |
|---|---|---|
| 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.
| Japanese | Romaji | Meaning |
|---|---|---|
| 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.
| Japanese | Romaji | Meaning |
|---|---|---|
| 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.
| Japanese | Reading | Meaning | When 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.
| Japanese | Romaji | Meaning |
|---|---|---|
| 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.
| Japanese | Romaji | Meaning |
|---|---|---|
| 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

