UKARU aggregates and analyzes exam results published by JAC (Japan Association for Construction Skill Training). Pass rate trends for Civil Engineering, Architecture, and Lifeline categories, plus latest strategies based on the December 2025 exam format change.
建設業界で20年の現場経験を持ち、数多くの外国人技能実習生の指導にあたってきた。現在はUKARU代表として、建設分野の特定技能試験対策をDXし、外国人が日本で長く活躍できる環境づくりに注力している。
著者について詳しく→3-line Summary
- In October 2025, pass rates reached record highs: Civil Engineering 55%, Architecture 68%, and Lifeline 57%.
- The primary cause of this surge was rush candidates attempting to pass before the December 2025 exam format change.
- From December onwards, rates are likely to return to the 20–30% range due to stricter anti-fraud measures (ban on multiple IDs and the 30-day interval rule).
"What is the pass rate for Specified Skilled Worker Level 2?" "Which category is easiest to pass?"
In this article, we explain the trends and pass rate transitions based on monthly exam results published by JAC (Japan Association for Construction Skill Training) and insights obtained from the UKARU question database.
| Period | Civil Engineering | Architecture | Lifeline | |------|-----------|-----------|-----------| | Before 2023 | Single digits to approx. 10% | Single digits to approx. 10% | Single digits to approx. 10% | | Early 2024 | Lower 10% range | Lower 10% range | Lower 10% range | | Oct–Dec 2024 | 13.9–20.5% | 16.7–31.6% | 15.9–20.0% | | August 2025 | 27.37% | 31.72% | 17.76% | | September 2025 | 29.50% | 37.16% | 35.29% | | October 2025 | 55.34% | 67.55% | 56.91% |
Sources: JAC Official Published Values, 3rd Party Aggregations (Foreign Talent Recruitment Lab, MEIKOGLOBAL, Reposer Solution, Nihongo Cafe), aggregated and processed by UKARU.
Pass rates are clearly on an upward trend. Compared to the lower 10% range in early 2024, the rate for Architecture reached 67.55% in October 2025, marking a record high.
However, this rapid increase is related to a specific factor: the December 2025 exam format change. We will explain this in detail in the next section.
We analyzed the factors behind the rising pass rates based on the data.
Since 2024, materials specifically tailored for Specified Skilled Worker Level 2 have increased. With the emergence of specialized learning tools like UKARU, the preparation level of candidates has improved.
The scope of categories for Level 2 was expanded, leading to an increase in the number of candidates. Highly experienced skilled workers are now taking the exam in greater numbers, raising the overall pass rate.
Construction companies have begun actively supporting their employees in obtaining Level 2 status. In-house study groups and subsidies for exam fees are becoming more common.
JAC has enriched its official textbooks, making the exam scope clearer. The situation where candidates "didn't know what to study" has significantly improved.
On September 17, 2025, JAC announced major changes to the exam implementation method starting December 2025.
Main changes:
Following this announcement, the October 2025 exam saw a concentration of candidates who "wanted to rush the exam before the stricter rules in December" and those who had "already prepared sufficiently using traditional methods," resulting in the anomalous value of 67.55% for Architecture.
Pass rates from December onwards are highly likely to return to 2024 levels (20–30%). For details, please refer to the article on the Major Exam Format Change in December 2025.
We compare the difficulty of the three categories based on pass rates and question characteristics.
| Item | Civil Engineering | Architecture | Lifeline | |------|-----------|-----------|-----------| | Pass Rate | Medium | High | Low | | Exam Scope | Wide | Medium | Extremely Wide | | Calculation Problems | Few | Almost None | Yes | | Utility of Practical Experience | High | High | Varies by field | | Recommended Study Period | 3 months | 4 months | 5 months |
Architecture is the easiest to pass because many candidates have experience in structural work, allowing them to utilize their on-site knowledge directly.
Lifeline is the most difficult because questions cover all three fields: Electrical, Plumbing, and HVAC.
Based on UKARU data and interviews with successful and unsuccessful candidates, we identified patterns common to those who fail.
Many people start studying only one month before the exam. A preparation period of at least 3 months is necessary.
Safety management accounts for approximately 25% of the total. Candidates who fail often underestimate this area, thinking "I do this on-site, so I'm fine," and fail to memorize the precise legal knowledge.
This is the case where candidates focus only on the written test and neglect the practical portion. The practical test requires reading blueprints and making construction judgments, which necessitates separate preparation.
There are very frequent cases of misreading "appropriate" vs. "inappropriate." Japanese reading comprehension is also a part of exam preparation.
Some people study only their strong areas and give up on their weak points. However, a score of 75% (30/40 questions) is required to pass. Neglecting weak points makes it difficult to reach the passing line.
Most successful candidates repeat the same question sets at least 3 times. Instead of trying to memorize everything at once, they solidify their memory through repetition.
Rather than "studying all at once on the weekend," they maintain 30 minutes of study every day. Consistent daily learning significantly increases memory retention rates.
Like the weakness analysis in UKARU, they objectively grasp their own weak points and concentrate their time there.
The exam is conducted in Japanese. Successful candidates focus on learning construction-specific terminology in Japanese.
They perform timed mock exams simulating the actual environment. A pace of 2 minutes per question for both written and practical portions is crucial.
We introduce trends in user correct answer rates from the UKARU database of over 810 questions.
There is a trend where things known through on-site experience have high correct answer rates, while things that can only be learned through classroom study have low rates.
It is highly likely to decrease in the short term. Starting December 2025, JAC is significantly changing the exam format, banning repeated testing using multiple IDs and introducing a 30-day interval rule. Pass rates are expected to return to the 2024 level (20–30%). For details, please refer to the article on the exam format change.
No. The most important thing is to choose the category that matches your practical experience. Even if the pass rate for Lifeline is low, if you have experience in electrical work, you may have an advantage over other categories.
Yes, many people pass through self-study. However, appropriate materials and a planned approach are necessary. Using specialized tools like UKARU significantly increases efficiency.
There is no official preferential treatment. However, once you take the exam, you will understand the questioning trends, making it easier to prepare for the next time. The experience of failing is a great asset for the future.
The pass rate for Specified Skilled Worker Level 2 reached a record high in October 2025 (Architecture 68.55%), but this was largely due to the special factor of rush candidates before the December 2025 exam format change. From December onwards, it is likely to return to the 2024 level (20–30%).
The overall picture of the exam is explained in the Complete Guide to Specified Skilled Worker Level 2 Construction, and the December exam format change is covered in the article on the Major Exam Format Change in December 2025.