For type approval in Japan, you need to show, with evidence, that your strength test data is consistent and that your assist control meets the standards. We support you on both the regulatory and the technical side, from planning and design through to consultation with the testing bodies.
In Japan, a pedal-assist e-bike is treated as a power-assisted bicycle — in the Ordinance for Enforcement of the Road Traffic Act, a kudo hojoki-tsuki jitensha (bicycle with a drive-assist device) — only if it meets the legal standards. The motor may only supplement the rider's pedaling, and the assistance is capped according to riding speed; for example, there must be no assistance at 24 km/h or above. A vehicle that meets these standards is treated as a bicycle under the Road Traffic Act, and no driver's license is needed.
Type approval (katashiki nintei) confirms, model by model, that a vehicle meets these standards. Approval is granted by the National Public Safety Commission. The type approval test that precedes it is conducted by the designated testing body, the Japan Traffic Management Technology Association (JTMTA; Kangikyo). Measurement tests — of the assist ratio (the ratio of motor assistance to the rider's pedaling force, called the "drive-assist ratio" in the testing bodies' documents), braking performance and more — are carried out by the Japan Vehicle Inspection Association (VIA), commissioned by the JTMTA. Approved models display a type approval number and may also carry the Type Approval TS Mark.
Type approval is voluntary: Japanese law does not require it before a power-assisted bicycle can be sold. However, any vehicle used on public roads as a bicycle must meet the standards, whether or not it has type approval. Type approval gives you third-party test results showing that the vehicle meets them, which supports your explanations to customers and business partners.
Depending on the assist ratio and control method, a vehicle may be classified not as a bicycle but as a motorized bicycle (moped). It then requires a driver's license, a license plate and compulsory liability insurance, and the vehicle must meet the safety standards under the Road Transport Vehicle Act. We can start by helping you determine which rules apply.
Many projects get stuck before the test, not at it. These three issues come up most often.
Test data from component makers may not match the conditions required by Japanese standards or the actual configuration of the vehicle. Good numbers are not enough if the test conditions differ.
How we help: We compare the test conditions with the vehicle's configuration, identify missing tests and points to check, and coordinate with component makers that have test facilities where needed.
Assistance must stay within the speed-dependent assist ratio limits. Some control settings fall outside the standards, and the vehicle may then no longer be treated as a bicycle.
How we help: We review the control settings and measurement results, and work with the manufacturer on settings that meet the standards with a margin.
Material certificates or control logs may be missing, or may not match the actual parts. Using them as they are for the test application leads to rework later.
How we help: We check the documents against the actual parts and request what is missing directly from the factory, in Chinese.
Our role is technical. As technical consultants, we are involved in the work it takes for your vehicle to meet the standards.
At the drawing and specification stage, we identify which rules and standards apply and assess how the vehicle can meet them.
We go through drawings, test data and control settings directly with the factory in Chinese, without an interpreter. We also work in English.
Where something falls short of the standards, we propose specific design changes or alternative parts.
We consult with the testing bodies on the technical documents needed for the test application and on how the test will proceed.
Where the interpretation of a standard is unclear, we confirm it with the competent authority.
We also work with component makers that have their own test facilities. We help you find a configuration that meets Japanese standards while making use of parts made in Taiwan or China.
The type approval test application and the type approval application are made by the applicant, in its own name. In many cases, type approval is obtained by the brand's distributor in Japan. An overseas manufacturer, or a company affiliated with it, can also apply in its own name, following the JTMTA's procedures. In that case, the approval is held by the manufacturer side, so it can generally continue to be used even if the manufacturer later changes its distributor in Japan (any required notifications of changes still apply). We have supported a European manufacturer whose affiliated company applied in its own name. In practice, however, you will need a contact in Japan, such as your importer or distributor, because the application documents must describe your quality assurance arrangements, including how recalls and similar matters would be handled in Japan. Who should be the applicant in your case is something we can discuss with you.
We support the technical side of that preparation:
We do not prepare the application forms or the documents to be submitted with them, and we do not submit anything on your behalf. If you want someone to prepare these documents for you, please consult a gyoseishoshi (Certified Administrative Procedures Legal Specialist), a licensed professional in Japan.
If you want to sell an overseas e-bike in Japan, the right approach depends on your business plan, sales volume and brand strategy.
| 1. Adapting an existing overseas model | 2. An original brand built on proven parts | 3. A new design from scratch | |
|---|---|---|---|
| Overview | Modify an existing model from an overseas brand for Japan. | Create your own brand for Japan using existing, proven components. | Design a vehicle from the ground up around your own concept. |
| Typical development time | Short to medium | Medium | Medium to long |
| Production lot | Depends on the lot size and production schedule required by the overseas brand. | Depends on the minimum order quantity for Japan-specific parts. | Medium to large. Tooling and development costs need to be recovered. |
| Main advantage | You keep the brand's recognition and design. | A good balance of practicality and originality. | You can design to Japanese standards from the start and differentiate more easily. |
| Main challenge | High dependence on the manufacturer; control details may not be disclosed. | The fit between components and frame must be verified. | Initial investment and securing sales volume. |
| Meeting the standards | Changes for Japan are needed. This can turn out to be the hardest route. | Can be designed with compliance in mind. | Can be designed for compliance from the start. |
| Best suited to | Bringing in a brand with an overseas track record quickly | Growing your own brand while running the business | Building your own brand over the long term |
If the motor or controller uses proprietary control, it may be hard to change it to meet Japanese standards. Changes can cascade from controller to motor, battery and frame, until the work approaches the scale of new development.
If a model produced for other markets or a shared platform can be used, you can sometimes create your own brand in a relatively short time with limited risk. However, if part changes require a frame redesign, it can come close to new development.
It offers the most freedom in meeting the standards, and the potential to create a new category with new designs or technology. In the premium e-bike markets of Europe and North America, some bikes are chosen as fashion or lifestyle products.
We work out which approach fits your plans together with you. In many cases, we recommend the second approach.
If you are an overseas brand considering the Japanese market or looking for a distributor in Japan, please get in touch. Depending on your plans, we may also be able to discuss introductions to businesses in Japan.
Below, our support and the stages of testing are shown separately. How long it takes depends on the vehicle's configuration, its development stage and the tests involved.
Use the form to tell us about the vehicle type, development stage, and where the parts are made.
We talk with you and look at drawings, test data and component certificates to identify issues and the work required.
We present the scope of support and the estimated workload, quoted on a person-month basis, and proceed once we have agreed. Testing fees charged by the testing bodies are separate.
We carry out regulatory checks, technical coordination with the manufacturer, proposals for design changes and alternative parts, and consultation with the testing bodies. Before the test, we run a final check to confirm that the assist ratio and other items meet the standards with a margin. Pass or fail is decided by the testing body.
| Stage | Step | Details | Our role |
|---|---|---|---|
| 01 | Checking the assist ratio before the measurement test | In the measurement test, the drive-assist ratio is judged in a single measurement, so the ratio must be checked and adjusted beforehand. We recommend doing this before applying. If you have your own test machine, you can use it; if not, you can use test machines at organizations such as the Japan Vehicle Inspection Association or Jitensha Sangyo Shinko Kyokai (a Japanese bicycle-industry foundation), and compile the results in a report. Even machines of the same type can give slightly different readings due to differences in equipment and test conditions. External test machines can also be hard to book at certain times, and may be allocated by lottery. Because a missed slot can mean a long wait, we recommend planning this pre-test with time to spare. | We support control adjustment and measurement. Rather than aiming for the limit, we propose settings that meet the standards with a margin, and confirm that before you apply. Pass or fail is decided by the testing body. |
| 02 | Applying to the JTMTA for the type approval test | The applicant submits the test request form to the JTMTA together with documents such as the specification sheet, external view drawings, structural drawings and the report confirming the ratio (drive-assist ratio measurement data), and pays the testing fee. | You apply in your own name. We explain what each field of the application form asks for and which of your technical data it refers to, review the technical materials to be attached (specifications, structure, measurement data) and advise you. We consult with the JTMTA on how the test will proceed. |
| 03 | Measurement test at the Japan Vehicle Inspection Association | After the JTMTA accepts the application, the formal measurement test is conducted at the Japan Vehicle Inspection Association. The application for the measurement test and the setting of the test date follow the guidance of the JTMTA and the association. The test date is set by the association. The measurement test assumes that adjustments are complete; settings cannot be adjusted on the day. The association measures the drive-assist ratio, braking performance, and the structure and performance of components. | We guide you through the required steps and carry out a final check of the vehicle and technical materials before the test. |
| 04 | Decision by the examination committee | The JTMTA's examination committee decides pass or fail based on the document review and the measurement test results. If a vehicle fails, one re-measurement test is allowed, in principle within six months. | We review the results. If the vehicle fails, we analyze the cause with you and support the design review. |
| 05 | Type approval | The National Public Safety Commission grants type approval to models that have passed the type approval test. (The applicant submits the type approval application through the JTMTA before the examination committee meets.) | You prepare and submit the application in your own name. We continue to review and advise on the technical content, and advise you if corrections are requested. |
The steps above are based on the JTMTA notice on accepting type approval tests for power-assisted bicycles and similar vehicles (July 25, 2025; Japanese). Procedures and fees may change; please check the latest JTMTA guidance.
Settings close to the upper limit can be tempting, but manufacturing variation and differences in measuring equipment and conditions can push results outside the standards. Because the formal measurement test allows no adjustment and judges the assist ratio in a single measurement, missing the limit means time and effort before a re-measurement test. We propose designs that meet the standards with a margin, and confirm this before the test. Pass or fail is decided by the testing body.
Our team is led by engineers who have worked in design and product planning at a major bicycle manufacturer. We check strength testing and control settings not only on paper but against the vehicle's structure.
We work directly with component makers and factories in Taiwan and China in Chinese. Drawings, test data and control settings can be discussed on the spot, so misunderstandings surface early. We also work in English.
We consult directly with the testing bodies and coordinate with component makers that have test facilities.
| Category | Main rules and standards | How we help |
|---|---|---|
| Power-assisted bicycles (kudo hojoki-tsuki jitensha) | Type approval by the National Public Safety Commission under the Ordinance for Enforcement of the Road Traffic Act (tests by the JTMTA) | From checking the assist ratio, control and strength test data through to preparing for the type approval test |
| Standard bicycles (futsu jitensha) | Type approval for standard bicycles by the National Public Safety Commission under the same ordinance (tests by the JTMTA) | Checking dimensions and structure against the standards, and preparing for the type approval test |
| Specified small motorized bicycles (tokutei kogata gendoki-tsuki jitensha) | Requirements under the Road Traffic Act, and safety standards under the Road Transport Vehicle Act. Compliance with the safety standards can be confirmed through MLIT's performance verification scheme (seino-to kakunin seido), in which a verification body checks the vehicle on application | Clarifying the rules, and technical consultation toward meeting the safety standards |
| Mopeds (e.g., motorized bicycles with pedals) | Safety standards under the Road Transport Vehicle Act (as motorized bicycles or two-wheeled motor vehicles). There are systems separate from the NPA's type approval, such as MLIT's type approval under Article 62-3 of the Ordinance for Enforcement of the Road Transport Vehicle Act | Even with pedals, these are treated as mopeds or motorcycles. We help clarify the rules and offer technical consultation toward compliance |
Depending on the assist ratio and control method, a vehicle designed as a power-assisted bicycle may be classified as a moped. You can start by asking us which category applies.
In 2026, a testing body told us that it could not accept type approval applications for e-bikes with saddles longer than 35 cm, and asked that saddles be shortened to 35 cm or less. The long saddle was central to the design, so we set out to find where the 35 cm figure came from.
We didn't get here by confronting anyone. We checked the rules one by one, and a proper path emerged.
"Accepted" means the applications were received for processing — not that type approval was granted. These vehicles are now heading into testing. Vehicles must still meet the standards for power-assisted bicycles, and a vehicle that is not a standard bicycle cannot, for example, be ridden on sidewalks.
As this is consulting work, we quote on a person-month basis. If the test plan needs to be revised or a re-measurement test is required, we present the additional workload and cost in advance and proceed only once we have agreed.
Testing fees and other charges paid to the testing bodies are separate from our fees.
From the planning and design stage. We also work with projects that have a prototype, are preparing for mass production, or are already on sale. In general, the earlier we check — before the design is fixed — the easier it is to keep design changes manageable.
Yes. Technical communication in Chinese is a particular strength: we work directly with factories in Taiwan and China on drawings, test data and control settings, without an interpreter. We also work in English.
Note that component test reports in other languages must be submitted with a Japanese translation.
Before the test, we run a final check to confirm that the assist ratio and other items meet the standards with a margin. Pass or fail, however, is decided by the testing body.
If the vehicle fails, we analyze the cause with you and continue supporting you toward a retest, from cause analysis to design review. When and how often a re-measurement test can be taken depends on the testing body's rules (under current JTMTA guidance, once, in principle within six months). This support is also billed on a person-month basis, with costs presented and agreed in advance.
We can't give a single answer, as it depends on the vehicle's configuration, development stage and the tests involved — and on how complete the test data and documents are, whether design changes are needed, and the testing bodies' schedules. Booking external test machines for the pre-test, and the application situation at the testing body, may also mean lotteries or waiting time. Once we understand your project, we will give you our view of the likely timeline.
We quote on a person-month basis, presenting the scope and workload in advance and proceeding once agreed. Revisions to the test plan or re-measurement tests are handled the same way.
Yes, you can consult us. We first look into the reason and its basis, then, where needed, confirm the rules with the testing bodies or government authorities and look for a way forward. Outcomes vary from case to case. In the 35 cm saddle case, this process led to applications being accepted (not to type approval being granted).
Yes. We can agree on the terms with you. If you would like to sign one before sending drawings, test data or other materials, please let us know when you contact us. Until an NDA is in place, please do not send highly confidential information.
You, as the applicant, prepare and submit the application forms and the documents to be submitted with them, in your own name. We explain what each field of the application forms asks for and which of your technical data it refers to, review the technical data from you and your factory and point out what is missing or inconsistent, and review and advise on the technical content of the documents you prepare. We do not prepare the application forms or the documents to be submitted with them, and we do not submit anything on your behalf. If you want someone to prepare these documents for you, please consult a gyoseishoshi (Certified Administrative Procedures Legal Specialist), a licensed professional in Japan.
Tell us the vehicle type, development stage, where the parts are made and your target timing. We will suggest how to proceed from where you are now. We work with factories directly in Chinese, without an interpreter, and in English.
