Japanese Construction Terms: The Words You’ll Hear on Site

Chapter 04

The Words for Tools

Why this list matters more than it looks

Tool words come up constantly, and almost always as a request. Someone needs something, their hands are full, and they say one noun at you.

Get these and you become useful on day one, which is a much faster route to being taught things than being careful and quiet.

Measuring and marking

A note on the tape measure. In a catalogue or on the box it’s a konbekkusu — from “convex,” describing the curved steel blade. On the sites I worked on nobody said that. They said sukēru, and if you ask for a konbekkusu you may get a puzzled look before the right tool.

That gap is worth knowing about in general. The word printed on a product and the word shouted across a slab are often not the same, and it’s the second one you need.

Power tools

Hand tools

Scaffolding

Safety gear — get these exactly right

There’s a reason I’ve separated these out. A misunderstanding about a tool costs you a walk across the site. A misunderstanding about a harness costs more than that. If someone says something about your hānesu and you don’t follow it, stop and ask. Nobody has ever been annoyed at me for checking that twice.

What all of this looks like worn on a belt, and why people carry so little, is in The Japanese Tool Belt.

One rule about tools that isn’t a word

Don’t pick up someone else’s tools.

Not because anyone will shout at you — most likely nobody will say anything at all, which is worse. Tools here are personal. People buy their own, maintain them, and know exactly where each one sits on the belt. Borrowing without asking reads as a statement about how you regard the person.

Karite mo ii desu ka? — may I borrow this? — is a short sentence, and it’s one of the few full sentences in this article I’d genuinely recommend memorizing.

Chapter 05

Directions and Signals

The words that move things

Once you can name a thing, the next job is moving it. This is a small vocabulary and you’ll use it more than any other.

Ōrai catches people out because it sounds like agreement. It isn’t. It’s an instruction to keep going — used when reversing a truck or bringing a load down — and it stops the moment someone says sutoppu.

Say what you’re about to do

Here’s a habit that takes a week to build and marks you out immediately.

On a Japanese site, people announce their movements out loud. Not to be polite — so that nobody is surprised by a person appearing where they weren’t a second ago.

These are full sentences, which I said you wouldn’t need. They’re the exception, and they’re worth it, because each one prevents a specific accident.

Lifting signals are somebody’s job

When something is being lifted by crane, one person is designated to give the signals. It isn’t a role that whoever is nearest picks up.

So the rule for you is simple: if you are not that person, do not signal. Even if you can see the load better than they can, even if you’re sure. Two people signalling a crane is how a load goes somewhere nobody intended.

What you can always do is shout abunai. Stopping the job is never the wrong call.

The habit that matters most in this whole article

I’ve put this here rather than in the FAQ because it’s the thing I’d most want you to take away.

**Do not say hai when you haven’t understood.**

Hai means yes, and on site it functions as “understood, I’ll do it.” It’s easy to say when you’re new, tired, being spoken to quickly, and would rather not make someone repeat themselves. Everyone does it at least once.

The problem is that the person walks away believing something has been arranged that hasn’t. In an office that produces a bad afternoon. On a site it can produce a crew standing at the wrong place with a crane booked, or worse.

Nobody minds being asked again. Everybody minds finding out at 15:00 that something was never understood at 09:00. The next chapter is the small set of phrases that let you avoid it.

Chapter 06

The Words That Aren’t in the Dictionary

Your app will fail you, and it’s worth knowing why

Some site words won’t be in your translation app, or will come back as something absurd. That isn’t the app being bad. It’s that these words were made on sites, by the people doing the work, and they were made in three predictable ways.

Once you can see the three patterns, an unfamiliar word stops being frightening. Here are five real ones.

Verbs invented from the action

Japanese makes verbs out of almost anything by adding -ru, and sites do it more than anywhere else. Hatsuru is the sound and the act of chipping concrete off. Barasu is undoing something that was built to be undone.

Note that barasu is neutral. Nobody is destroying anything — formwork exists to be removed, and taking it down is a normal, skilled, scheduled job.

Nicknames from the shape

Neko means cat. The full name is nekoguruma — cat cart — and there are various stories about why. Nobody on site will tell you any of them. They will say “neko,” and point.

This is the pattern that catches people hardest, because the word is a completely ordinary Japanese word with a completely different meaning. If you hear a common word in a context where it makes no sense, assume it’s one of these before you assume you misheard.

Product names that became the word

Hōmu tai started as a product name. It’s now simply what the thing is called, by everyone, regardless of who made it.

You met this pattern already with the tape measure in chapter 4 — the catalogue says konbekkusu, the site says sukēru. It’s the same phenomenon from the other direction, and it’s why a vocabulary list built from product catalogues will quietly let you down.

And one word that’s just a noun made from a verb

Fukasu means to build something out — to pack it thicker. Fukashi is the result. You’ll hear it when a wall has to come forward to cover a pipe, or to line up with something next to it.

It’s a good word to know even if you never say it, because if someone tells you there’s 30 mm of fukashi and you don’t know the word, you’ll set out from the wrong face.

Five words are not enough, and that’s the point

I’ve deliberately kept this short.

There are hundreds of these, they vary by trade and by region, and an article listing all of them would be an article nobody finishes. You’ll pick up the ones your own crew uses within a month, in the only way anyone ever does — hearing them, not reading them.

What you need isn’t the full list. It’s a reliable way to ask about the one word in front of you right now, which is the next chapter.

Chapter 07

What to Say When You Don’t Understand

Six phrases, and then you can stop studying

Everything up to here has been vocabulary. This chapter is the part that keeps working after the vocabulary runs out, which it will, every day, for a long time.

Six phrases. If you learn nothing else in full-sentence form, learn these, and learn them well enough to say them fast — because the moment you need them is the moment you’re flustered.

The strongest one is about the drawing

Zumen de misete kudasai is the phrase I’d put above the rest, and not because of the Japanese.

It does something clever: it converts a language problem into a drawing problem. You may be new to Japanese, but you are not new to construction. On a drawing you are competent. You can point, measure, count, and disagree.

It also asks very little of the other person. You’re not asking them to teach you a language. You’re asking them to use the thing already rolled up under their arm — which takes ten seconds and is how they’d explain it to a Japanese apprentice anyway.

Point, and use “this”

Kore (this), sore (that), are (that over there). Combined with a finger, these three words carry an enormous amount of the day.

Kore, nan desu ka? — what’s this? — asked while holding the thing, is a complete and perfectly normal question. Nobody expects more.

And when you learn the answer, repeat it back once, out loud. It fixes the word, and it shows the person that their ten seconds worked.

Ask at the break, not during the lift

Timing matters as much as wording.

Do not stop a crew mid-lift to ask what something is called. Ask at ippuku, when people are sitting down with a drink and nobody is holding anything heavy.

This is how I learned most of what I know, incidentally. When I was young I’d just ask the craftspeople directly — “what kind of work is this?” — and they’d tell me, at length, because during a break there’s time and because people generally like explaining work they’re good at.

Same question during a concrete pour gets you a look, and rightly so.

Write it down the same day

Carry something to write on. A phone works; a small notebook in your belt works better, because it doesn’t need clean hands or a signal.

When you learn a word, write it as you heard it — katakana, romaji, whatever you can manage — and then draw the thing next to it. The drawing is the definition. You will not remember fukashi from a translation, but you will remember it from your own bad sketch of a wall packed out over a pipe.

Look at the page again that evening. Ten minutes on the day you heard a word is worth an hour a week later.

One last thing about asking

There’s a feeling, when you’re new and foreign and slow, that asking again is an imposition — that you’ve already used up your allowance of other people’s patience.

I want to be direct about this, because it costs people years.

The person who asks twice is cheaper than the person who guesses once. Everyone on that site knows it. A supervisor would far rather answer the same question three times in a morning than find out at 15:00 that a crew has been working from an assumption. When you ask, you are not taking something from the job. You are doing the job.