Ask a Japanese factory manager what kind of worker they need and the answer is rarely “someone for the car plant” or “someone for electronics”. It is far more likely to be a process: a welder, a press operator, someone who can run a moulding machine or set up a CNC lathe, a plater, a sewing machinist. The same skill can be used for car parts one year and medical equipment the next, and the people who master a process tend to earn more and move between employers more easily than general line workers.
This article looks at factory work in Japan through that lens of skills and contracts. It describes eight process-based roles, gives typical monthly yen pay, explains the job categories inside the Specified Skilled Worker manufacturing field, and covers fixed-term and seasonal contracts, national trade skills tests, workplace licences, health protection, the gap between small workshops and big plants, and everyday life in factory towns.
Factories Hire by Process, Not by Product
Japanese manufacturing rests on a deep supply chain. A finished car or appliance is assembled by a large company, but most of its parts come from thousands of small and mid-sized firms that each specialise in one or two processes. A family workshop in Osaka might only do metal stamping. A plant in rural Tohoku might only plate parts. Another in Gifu might only cut and sew.
For a job seeker, this means two things. First, there are openings far beyond the famous industrial belts. Second, learning one process well is often more valuable than moving between unrelated assembly jobs.
Eight Shop-Floor Roles Worth Knowing
Welder
Welders join metal parts using arc, MIG, TIG or spot welding, for products ranging from steel frames to exhaust parts. Beginners often start on robotic welding cells, loading parts and checking seams, before moving to manual work. Accurate manual welders are in steady demand.
Metal Press Operator
Press operators feed steel or aluminium sheet into machines that stamp out brackets, panels and housings. The work is loud and repetitive, and safety rules around hand placement are extremely strict. Skilled operators also change and adjust the heavy dies.
Injection Moulding Operator
Moulding operators run machines that melt plastic pellets and shoot them into moulds to make anything from car interior trim to phone cases. Daily tasks include removing parts, trimming excess plastic, watching for defects and adjusting temperature or pressure settings under supervision.
CNC Machinist
Machinists set up computer-controlled lathes and milling machines, load programmes, measure finished parts with precision gauges and replace worn tools. This is one of the better-paid shop-floor paths, especially for people who can read technical drawings.
Plating and Coating Operator
Surface treatment workers dip, spray or electroplate parts to protect them from rust or give them a finish. The work involves chemical baths and paint booths, so ventilation, protective gear and health checks are a large part of the job.
Sewing Machine Operator
Garment and textile factories, many in regional prefectures, employ machinists to sew uniforms, workwear, car seat covers and bags. Speed and accuracy improve with practice, and pay often sits near the lower end of manufacturing.
Corrugated Box Line Worker
Box plants turn large paper rolls into cartons for shipping, feeding machines, stacking finished bundles and changing printing plates. Demand tends to follow online shopping and food production, so work is generally steady.
Seafood Processing Worker
Coastal factories in Hokkaido, Tohoku and Kyushu clean, fillet, freeze and pack fish, scallops and other seafood. Rooms are cold and wet, and work often peaks during fishing seasons. This role falls under food manufacturing rather than industrial products.
Monthly Pay by Process Skill
The ranges below are broad estimates of monthly gross pay for full-time workers, before tax and social insurance. Overtime, night shifts and bonuses can push totals higher, while small rural workshops often pay toward the lower end.
| Factory Role | Typical Monthly Pay (Yen) | Licence or Test That Helps |
|---|---|---|
| Welder | ¥230,000 to ¥320,000 | Arc welding special training; welding certification |
| Metal press operator | ¥210,000 to ¥280,000 | Press safety training; die setting experience |
| Injection moulding operator | ¥200,000 to ¥270,000 | Trade skills test in plastic moulding |
| CNC machinist | ¥230,000 to ¥330,000 | Machining trade skills test; drawing reading |
| Plating or coating operator | ¥210,000 to ¥280,000 | Organic solvent and chemical handling courses |
| Sewing machine operator | ¥170,000 to ¥220,000 | Sewing trade skills test |
| Corrugated box line worker | ¥200,000 to ¥260,000 | Forklift licence |
| Seafood processing worker | ¥170,000 to ¥230,000 | Food hygiene training |
Every number in this table is an estimate for general guidance only, and actual pay changes with the company, region, process, shift pattern and overtime. This article is career information and not a job advert, and it does not offer recruitment or immigration services. Please verify all terms with the employer, and confirm status and labour rules with the Immigration Services Agency of Japan and with Hello Work or the Ministry of Health, Labour and Welfare.
Hourly pay behind these figures must never fall under the local minimum wage. Under the FY2026 rates that took effect from October 2026, that floor is about ¥1,280 in Tokyo and a little above ¥1,080 in the lowest prefectures, which matters most for sewing and seafood plants in rural areas.
The Job Categories Inside the Industrial Products Field
The Specified Skilled Worker field for manufacturing industrial products now lists 17 job categories for SSW (i). Alongside the core areas of metal machining, electrical and electronic equipment assembly and metal surface treatment, it includes paper containers and corrugated boxes, concrete products, RPF fuel, ceramics, printing and bookbinding, textile products, sewing, electric wire and cable, prefabricated housing parts, furniture, refractories, ready-mixed concrete, rubber products and bags. The Immigration Services Agency notes that job descriptions for some newly added categories are still being prepared.
A worker needs to pass the relevant skills test, or hold an equivalent such as trade skills test grade 3, plus JFT-Basic or JLPT N4. SSW (ii) is open only in the three core categories, which matters if you want to stay long-term. Seafood processing sits in the separate food and beverage manufacturing field.
Many people on factory floors also arrive through Technical Intern Training, which is expected to be replaced by the Employment for Skill Development system around April 2027, or hold an unrestricted status such as permanent residence or a spouse visa. From abroad, the path runs through a Certificate of Eligibility, a visa at a Japanese embassy and a residence card on arrival.
Kikanko and Other Fixed-Term Contracts
Large car makers and some parts suppliers have long hired kikanko, or seasonal contract workers, on terms of a few months that can be renewed. These posts often come with a dormitory, a fixed daily or monthly rate and a completion bonus for finishing each contract term. They can be a fast way to save money, but the work is demanding and the contract can end when production slows.
Kikanko jobs are mostly filled by Japanese nationals and foreign residents with an unrestricted status, since employer-linked statuses usually require a different type of employment. If you hold such a status, read the contract term, the renewal rules and the bonus conditions carefully.
Japan’s Labour Contract Act also gives fixed-term workers an important right. When fixed-term contracts with the same employer have been renewed so that the total exceeds five years, counting from contracts that started on or after 1 April 2013, the worker can request conversion to an indefinite contract, and the employer cannot refuse. A long enough gap between contracts can reset the count, so keep copies of every contract you sign.
National Trade Skills Tests and Workplace Licences
Japan runs a national system of trade skills tests, known as ginou kentei, with grades from basic to grade 3, grade 2 and grade 1 in many occupations, including machining, plastic moulding, plating and sewing. Passing grade 3 can count as the skills requirement for SSW (i) in the industrial products field, and higher grades often bring a monthly allowance from the employer.
Separate from those tests, the law requires specific training or licences for certain hazardous tasks. Common examples on factory floors include:
- Forklift: a skills training course for trucks of 1 tonne or more, and special education for smaller ones.
- Arc welding: special safety education before welding work.
- Cranes and slinging: courses for overhead cranes and for attaching loads to them.
- Organic solvents and specified chemicals: supervisor courses for paint and plating areas.
Employers usually arrange and pay for the training needed for your own role. Each certificate you earn is portable, so it stays useful if you change companies later.
Heat, Noise and Chemicals: Protecting Your Health
Factory hazards vary by process. Press and stamping lines are loud enough to need hearing protection. Welding produces fumes and intense light. Plating and painting expose workers to chemicals, and seafood plants mean long hours in cold, wet rooms. Summer heat inside metal buildings without full air conditioning can be dangerous.
Japanese employers must provide annual health checks, and workers handling certain chemicals or doing noisy work may also receive special health examinations. Wear the gloves, masks and ear protection supplied, follow lock-out rules before clearing a jam, and report symptoms such as headaches, skin rashes or hearing changes early. Workers’ accident insurance covers job-related injuries and illness for every worker, whatever their nationality.
Small Workshops Versus Large Plants
Large plants offer structured training, clear rotas, canteens and often a bonus paid twice a year. The work is usually narrow, and you may do the same task for months. Small workshops of ten to fifty people pay less on paper and may lack formal training programmes, but workers often learn several processes and get to know the owner personally. Many skilled machinists and welders built their careers in exactly these smaller shops.
Ask any employer how many foreign staff already work there, whether instructions are given in a language you understand, and how overtime is recorded. Those answers say a lot about daily life on the floor.
Hours, Premiums and Insurance on the Line
The Labour Standards Act sets a normal maximum of 8 hours a day and 40 hours a week. Overtime is paid at a premium of at least 25 percent, and hours between 10pm and 5am earn a late-night premium of at least 25 percent. Full-time factory staff should be enrolled in health insurance, the employees’ pension and employment insurance. Check that deductions for dormitories, meals or work clothing are listed clearly on each payslip and agreed in writing.
Life in Regional Factory Towns
Many workshops and plants sit in towns where buses are infrequent and the nearest station may be far away. A car or bicycle often becomes essential, and some employers run shuttle vans to the gate. Rent is usually much lower than in big cities, supermarkets close earlier, and community life revolves around local festivals and seasonal events. Learning everyday Japanese, registering with your local city office and joining a local support group for foreign residents make settling in far easier.
Building a Trade, One Certificate at a Time
Factory work in Japan pays best when you treat it as a trade rather than a temporary job. Choose a process you can grow in, collect the trade skills grades and workplace licences that go with it, understand your contract type and the five-year conversion right, and protect your health on the floor. Over a few years, a beginner on a moulding machine or welding cell can become the skilled operator every workshop wants to keep.
Workshop Floor Questions, Answered Plainly
Can foreign residents take seasonal kikanko contracts at car plants?
Generally yes, if they hold a status with no work restriction, such as permanent resident or spouse of a Japanese national. Holders of employer-linked statuses usually cannot simply switch to a seasonal contract with another company.
Does a forklift licence help in a factory job?
Very often. Many plants move materials by forklift, and a licence for trucks of 1 tonne or more can make you more useful on the floor and may add a small allowance.
Can an SSW industrial products worker move into a sewing job?
Sewing is one of the categories in the same field, but moving between categories usually means passing the matching skills test and following immigration procedures for the new employer. Check the details with the Immigration Services Agency first.
