内装工 内装工
What 内装工 do
An English description is being prepared. Japanese description:
内装仕上げには床仕上げと壁・天井仕上げなどがあり、建物の種別、用途などにより、それぞれ用いられる材料が異なる。建物の用途、種類、面積によっては、建築基準法と消防法や条例などによって材料、施工方法が規制を受ける。
用いられる材料は、寸法、色調、デザインなど材料メーカー独自のものも多く、用途によって非常に多様である。このため、内装仕上げに従事する内装工の仕事は多くの専門領域に分かれ、その主なものは床仕上げ工、鋼製下地組立工、ボード張り工、壁装工であるが、様々な作業をこなせる多能工を目指す人も多い。
床仕上げ工は、左官が仕上げたコンクリート床や大工が仕上げた木造床の床面に基準線を引いて、中心からタイル、フローリング、シート類を張ったり、カーペットやじゅうたんを敷き込む。鋼製下地組立工は、軽量鉄骨や付属金物を使って、各部屋を仕切る壁や二重天井の下地を組み立てる。ボード張り工は、鋼製下地組立工が組み立てた鋼製下地や大工が作った木製下地に、合板、繊維板、石膏ボードなどを張って仕上げる。壁装工は、左官仕上げされた壁、天井、ボード張り面などの下地に、ビニールクロスなどの壁紙類を張る。
カーテンの縫製取付やブラインドの取付、ふすまや障子の紙張りなども内装工の仕事である。
◇ よく使う道具、機材、情報技術等
工具（かなづち、のこぎり等の手動工具、ドリル等の電動工具）、作業中の保護具（ヘルメット、ゴーグル、グローブ、安全靴等）
Employment type of workers
内装工 salary
The average annual pay for 内装工 in Japan is ¥4.67M (≈ $29,690; Basic Survey on Wage Structure (2025), national). The estimated median is ¥4.34M, the typical range is ¥3.28M–¥7.79M and the top 10% earn about ¥6.75M.
How does your pay compare with people your age?
Your numbers are not sent or stored. The distribution is estimated from Japan's national wage statistics, including pay differences by age.
Pay by ageest.
Estimated from the average pay and average age (41.6) using the age-wage curve of the Basic Survey on Wage Structure.
Pay by experienceest.
Pay by employment typeest.
The average hourly wage of ¥2,161 is 1.8× Japan's national average minimum wage of ¥1,177 (fiscal 2026). Minimum wage by prefecture →
Japanese pay is shown in yen (¥5.57M = 5.57 million yen ≈ 557万円). Dollar figures use the current rate of 157.25 yen per dollar and are for reference only; purchasing power differs.
Pay over time
| Year | Average pay | Employment | Openings ratio |
|---|---|---|---|
| 2021 | ¥4.32M | — | — |
| 2022 | ¥4.61M | — | — |
| 2023 | ¥4.53M | — | 4.82x |
| 2024 | ¥4.53M | — | 4.59x |
| 2025 | ¥4.67M | — | 4.37x |
Projected pay for 内装工 (3, 5 and 10 years)est.
Today ¥4.67M → in 3 years ¥5.16M → in 5 years ¥5.52M → in 10 years ¥6.53M (10-year range ¥5.61M–¥7.58M). The model assumes pay growth of +3.4% per year.
What drives the annual growth rate
Projected pay = current pay × (1 + annual growth)^years. The annual growth rate starts from a base wage-growth rate and adds or subtracts labor demand (the job-openings-to-applicants ratio), wage momentum and AI replacement risk for each occupation. Projections are not guarantees. How it is calculated →
Outlook score for 内装工
Each component is a percentile rank among all occupations in the same country (0–100). Weights: labor demand 25, wage momentum / openings 15, pay level 15, AI resistance 25, aging workforce 10 (Japan only), entry barrier 10.
Will AI replace 内装工? AI replacement risk
How AI is changing this job
A written analysis for this occupation is being prepared.
AI replacement risk compares the parts of a job that are easy to hand to AI or software (processing information, documentation, repetitive computer work) with the parts that are hard to automate (physical work, working closely with people, judgment in unpredictable settings), using the MHLW job tag survey on work activities, work context, skills and knowledge. The result is a relative position among all occupations in the country, scaled to 0–100%. Methodology →
Labor demand for 内装工
A ratio above 1.0 means there are more job openings than applicants (a labor shortage). The 5- and 10-year figures are estimates from the openings ratio, wage momentum and AI replacement risk.
The same job in the United States
| 内装工 Japan | Drywall and Ceiling Tile Installers United States | |
|---|---|---|
| Median / average pay | ¥4.67M ≈ $29,690 | $58,930 |
| Pay in 10 years (est.) | ¥6.53M | $80,900 |
| Outlook score | 64 | 56 |
| AI replacement risk | 18% Very low | 10% Very low |
| Workers | — | 83K |
Matched by occupation (SOC code). Yen converted at 157.25 JPY/USD for reference; Japanese figures are averages, U.S. figures are medians, and the surveys define occupations differently.
Skills, education and requirements for 内装工
Key skills
Skill levels from the MHLW job tag worker survey.
Key knowledge areas
What the work involves
Important abilities
Licenses and certifications (Japan)
- １級表装技能士 National license
- ２級表装技能士 National license
- １級内装仕上げ施工技能士 National license
- ２級内装仕上げ施工技能士 National license
- ３級内装仕上げ施工技能士 National license
- 1級シャッター施工技能士 National license
- 2級シャッター施工技能士 National license
- 3級シャッター施工技能士 National license
Related qualifications listed on job tag (names in Japanese). Some are mandatory, others recommended.
Education of workers
Training before entry
Related work experience
Difficulty of entry: ★★★☆☆ Moderate (from education, training, experience, licenses)
How to become 内装工
The typical path in Japan is shown by the education, training and experience of current workers above and in the Japanese guidance below. A detailed English guide for this occupation is being prepared.
Guidance from job tag (Japanese)
厚生労働省の技能検定の「内装仕上げ施工技能士」、「表装技能士」の資格を取得すると、技術の証明となり、仕事の幅が広がる。
一人前の内装仕上げができるようになるには、ある程度の時間が必要だが、技能が身につけば若くして独立することも可能である。
内装仕上げの各職種とも、基本的には肉体労働で、壁・天井仕上げ施工では足場作業などもあるため、体力が求められる。また、いずれも仕上げの美しさに関係する仕事であることから、美的感覚や空間判断力が望まれる。
様々なライフスタイルに合わせてニーズが多様化しているため、トータルインテリアの提案や施工が求められている。
Career path and how to earn more as 内装工
Career-path guidance is being prepared. Pay by experience is shown in the Pay section.