NAIway Translation Service – Your Trusted Partner in Translation
NAIway Translation Service is operated by NAI Inc., established in 1995. As a leading company specializing in English editing and translation for natural science research papers, we have earned a reputation for unparalleled quality.
Driven by our commitment to expertise and excellence, and in response to strong client demand, we launched NAIway to extend our high standards to professional translation services. We cover a wide range of fields, including business documents, law, IT, engineering, tourism, menus, medical translations, SDS (MSDS), anime/novels, and web/SNS content.
Translation Methods & Optimized Quotation
Translation by Professional Translators
（Traditional Human Translation + Quality Check）
At NAIway, our human-powered translation stands out for three key strengths: expert translators with deep domain knowledge, multilingual coverage across more than 30 languages, and a rigorous bilingual double-check system for quality assurance. We also specialize in simultaneous multi-language translation projects, delivering consistency and precision across every version.
AI Translation x Check
（AI-Powered Translation + Human Review）
Our AI-powered translation services primarily focus on Japanese–English and English–Japanese. However, other language pairs may also be supported upon request, either through direct AI translation between the source and target languages, or by leveraging English as an intermediary language with expert post-editing.
Quotation Tailored by Our Coordinators
Our dedicated coordinators will review your submitted document and determine whether "AI-Powered Translation" or "Human Translator-Based Translation" is the best option. We will then provide you with a tailored quotation.
If you prefer "Human Translator-Based Translation," please select this option in the quotation/inquiry form.
Please feel free to contact us.
Certified under ISO 17100, the international standard for translation quality assurance
We believe that a translation company’s mission is to understand the diverse needs, objectives, and quality expectations of its clients and deliver results that align with the desired quality, turnaround time, and cost. However, translation quality can only truly be assessed once the final product is delivered.
To eliminate this uncertainty, we proactively obtained ISO 17100 certification, a globally recognized benchmark for translation quality.
By adhering to international standards, we ensure consistent quality and reliable service. After carefully listening to your requirements, we propose the optimal translation plan tailored to your needs.
Feel free to reach out to us anytime!
Certification scope: "Japanese to English, English to Japanese"
A: Finance, Economics, and Legal
B: Medical and Pharmaceutical
C: Industrial and Science & Technology
E: Other Fields
What is ISO 17100?
ISO 17100 is an international standard (published in May 2015) that defines the requirements for all aspects of the translation process that directly impact the quality and delivery of translation services.
It sets minimum requirements for translation service providers (TSPs), covering key aspects such as core process management, translator qualifications and competencies, resource availability and management, and quality control measures necessary to ensure high-quality translation services.
(Source: Japan Standards Association, Certification Services Website)
Key Features of NAIway’s Professional Business Translation Services
Feature1 Over 29 Years of Expertise and Proven Excellence
NAIway Translation Service – Expanding Excellence Beyond Academic Translation
Founded in 1995, NAI has built a strong reputation as a premier English editing and translation company for academic papers. Our unwavering commitment to expertise and uncompromising quality has earned us long-standing trust and support.
Driven by our dedication to excellence and in response to growing client demand, we launched NAIway Translation Service to extend our specialized approach to professional and general translation. We cater to a wide range of fields, including business, law, IT, engineering, tourism, menus, medical translation, SDS (MSDS), anime/novels, and web/SNS content.
Feature2 Supporting Multilingual Translation
- Professional Translator
Expert Multilingual Translation Services
We work with carefully selected professional translators from around the world to provide high-quality translations in various languages.
Our experienced translators handle a wide range of language pairs, including English to Japanese as well as Japanese to English, Chinese, Korean, Vietnamese, Italian, and French, among many others. For languages where direct translation from Japanese is challenging, we can provide translations via English as an intermediary.
We also offer simultaneous translation into multiple languages. If you require translation into rare languages, please feel free to contact us for consultation.
Feature3 Thorough Consultation for a Satisfactory Outcome
- Professional Translator
- AI Translation
High-Quality Translation Backed by Thorough Consultation
NAIway Translation Service has earned high praise from many clients for delivering top-quality translations.
To ensure excellence, our dedicated coordinators carefully listen to your requirements and identify key considerations for the translation process. Based on this, we select the most suitable translator for your project.
Additionally, upon request, we offer online meetings or in-person consultations for a more in-depth discussion to meet your specific needs.
Feature4 NAIway’s Unique Quality Assurance System (QAS)
- Professional Translator
Rigorous Quality Assurance
To deliver high-quality and refined translations, we implement a strict Quality Assurance System (QAS) to review every translation after completion.
Our experienced quality controllers meticulously check each document, ensuring not only accuracy and completeness but also natural flow, consistent terminology, and appropriate expressions tailored to the document’s purpose. This thorough process guarantees a polished, high-quality translation.
Even for AI-powered translations, our quality controllers carefully review the text for omissions and inaccuracies, providing you with a reliable and refined final product.
Feature5 Post-Delivery Inspection
- Professional Translator
- AI Translation
Quality Assurance & After-Sales Support
After delivering the translated document, we offer a standard one-week review period※1 for your inspection. If you have any questions or require revisions during this time, please contact us, and we will provide aftercare support※2.
Unlike some translation companies that charge additional fees for post-delivery revisions, NAIway Translation Services includes revisions within the review period in the quoted price※3, ensuring peace of mind. Our goal is to provide translations that meet your complete satisfaction. Once you experience our service, we are confident you'll recognize its value.
Please note:
- If needed, we can extend the review period based on document volume and prior consultation.
- Other extra services(e.g. special proofreading/DTP layout adjustment) are not covered under this policy.
- Significant sentence modifications or new content additions may incur additional charges.
Please feel free to contact us.
Quotation for Translation Services
Translation Fee Estimates at NAIway
At NAIway Translation Service, we calculate translation fees based on character or word count of source documents, as well as factors such as the source and target languages, content complexity, and desired translation quality. Additionally, we consider deadlines and budget requirements to provide the best possible proposal tailored to your needs.
To request a quotation, please submit your text document in Word, PowerPoint, Excel, PDF, or other formats. If a document is unavailable, we can provide a rough estimate based on the information provided.
※Please note that rough estimates may differ from the final cost.
What’s Included in NAIway’s Translation Fees
NAIway’s Translation Fees Include the Following Services:
Translation
+
Native-Level Quality Check
+
After-Support
Post-Delivery Review Period for Verification
As part of our aftercare service, we provide support for inquiries and revisions within the standard one-week post-delivery review period for verification (Amendments or additions to the original manuscript cannot be processed during the review period. Please be advised that such revisions may be subject to additional fees).
Estimate
The actual cost will be estimated based on the content and volume of the document. Please send us the document when requesting a quote.
Minimum Charge Policy
Depending on the character/word count and other conditions, we have a two-tier minimum charge system of 5,500 Japanese Yen or 11,000 Japanese Yen (tax included). This ensures coverage of the essential costs involved in translation coordination and quality assurance.
International Client Minimum Charge Policy. In consideration of the additional procedures involved in international transactions, we kindly ask that orders from overseas clients be limited to projects valued at ¥50,000 or more. For quotations below this amount, a minimum charge of ¥50,000 will be applied as our standard international client policy.
For more details, please feel free to contact us.
Turnaround Time for Professional Business Translation
Translation by Professional Translators
The delivery time is determined based on factors such as the language pair, content, and volume of the document.
Since turnaround time varies by project, please indicate your preferred delivery date when filling out the "Quote / Inquiry" form.
Sample Turnaround Time for Japanese-to-English Translation 
| Japanese characters in the source manuscript | Delivery time (business days*) |
|---|---|
| 1,000 characters | 1 business day ~ |
| 5,000 characters | 3 business days ~ |
| 10,000 characters | 6 business days ~ |
| 20,000 characters | 8 business days ~ |
*Subject to variation depending on the content and difficulty of the manuscript.
Sample Turnaround Time for English-to-Japanese Translation 
| English words in the source manuscript | Delivery time (business days*) |
|---|---|
| 1,000 words | 2 business day ~ |
| 5,000 words | 4 business days ~ |
| 10,000 words | 6 business days ~ |
| 20,000 words | 10 business days ~ |
*Subject to variation depending on the content and difficulty of the manuscript.
AI Translation x Check
We can deliver in a shorter timeframe than "Translation by Professional Translators."
Since turnaround time varies by project, please indicate your preferred delivery date when filling out the "Quote / Inquiry" form.
The details may vary depending on the content and field of the manuscript. For more information, please contact us.
Sample Turnaround Time for Japanese-to-English Translation
| Japanese characters in the source manuscript | Delivery time (business days*) |
|---|---|
| 1,000 characters | 1 business day ~ |
| 5,000 characters | 2 business days ~ |
| 10,000 characters | 3 business days ~ |
| 20,000 characters | 5 business days ~ |
*Subject to variation depending on the content and difficulty of the manuscript.
Sample Turnaround Time for English-to-Japanese Translation
| English words in the source manuscript | Delivery time (business days*) |
|---|---|
| 1,000 words | 1 business day ~ |
| 5,000 words | 2 business days ~ |
| 10,000 words | 3 business days ~ |
| 20,000 words | 6 business days ~ |
*Subject to variation depending on the content and difficulty of the manuscript.
If you have any questions, please feel free to contact us.
Introducing NAIway’s AI Translation & Check
Our checkers are seasoned translators with a keen eye for inaccuracies and unnatural expressions.
Experienced translators with the expertise to correct AI-specific mistranslations thoroughly review the AI-generated output, comparing it against the original text to ensure accuracy and naturalness.
Our coordinators assess whether the manuscript is suitable for AI translation.
AI translation is well-suited for general business documents, business emails, press releases, internal newsletters, manuals, and legal documents.
At NAIway, our experienced coordinators carefully assess whether your manuscript is suitable for AI translation and determine the best approach to deliver the highest quality results. We provide tailored recommendations to ensure the most effective translation for your needs.
| Translation Language | English to Japanese/Japanese to English (AI translation combined with expert review is often possible for other languages as well, especially when English is used as an intermediary). |
|---|---|
| Translation Fees | Starting from 5.09 Japanese Yen per source character/word (tax included).* Pricing may vary depending on the content and field of the manuscript. Please contact us for details. |
*Consumption tax may not be levied on transactions with entities based outside Japan. Where applicable, this will be noted on our estimates and invoices. Documentation confirming your overseas status may be required.
Editing AI-generated translations is a highly complex and challenging task.
AI translation technology has evolved dramatically, reaching levels that would have been unimaginable just five years ago. The improvements are nothing short of remarkable.
However, no matter how advanced AI translation becomes, it still falls short of perfection. If we consider the highest-quality human translation, one done by an expert translator and meticulously reviewed by a native speaker, as 100%, AI translation currently achieves around 97% accuracy at best.
The remaining 3% represents a critical gap, one that AI, even with its neural network-based sophistication, struggles to bridge. This gap consists of subtle yet crucial elements that require human intuition, cultural awareness, and linguistic finesse, areas where AI is prone to "misinterpretations," "assumptions," and "misunderstandings." These pitfalls can significantly impact the final translation.
At NAIway, we focus precisely on this final 3%, offering a specialized service designed to refine AI-generated translations. By leveraging the expertise of seasoned translators, we ensure accuracy while maintaining fast turnaround times and cost efficiency. Our goal is to deliver high-quality translations that combine the best of AI technology with human expertise.
Other Services
DTP Services (Desktop Publishing Services)
This service involves inserting translated and proofread text into the original data while adjusting the layout, fonts, and other design elements.
It is essential to provide the original data (before outlining) in formats such as Illustrator.
Please note that we cannot work with data that has already been outlined.
Our quotation includes the cost of creating the DTP data as well as several rounds of review and revisions.
Trial Translation
For first-time customers, we offer a free trial translation of up to 300 Japanese characters(source manuscript) or 200 English words(source manuscript). Any content beyond this limit will be subject to a fee.
If you are interested, we will provide a questionnaire where you can specify your requirements.
Should you decide to proceed with an order after the trial translation, we will need to adjust the delivery schedule based on the availability of our translators.
Transcription
We provide transcription services for audio and video files.
We can also translate the transcribed text and deliver the final data in various formats, including translated text only, bilingual format (original + translation), or with timecodes, depending on your needs.
Pricing varies based on the length of the audio/video and the target language for translation.
Proofreading Services
Proofreading by Comparing the Original Text and Translation
Checking for grammar errors, mistranslations, and spelling mistakes
Ensuring the translation aligns with the original text
Proofreading of Translated Text Only
- Checking for grammar errors, mistranslations, and spelling mistakes
Please note that we do not provide adaptations or copywriting services.
If you have any questions, please feel free to contact us.
Translation Process
flow1 Thorough Consultation
Inquiry & Quote Request
Quotation Calculation
Meeting & Consultation
Through online meetings or chat, our coordinators will discuss your requirements and objectives.Recalculation of Quotation※
※We may provide a revised quotation based on your requirements.Invoice Issuance (For Advance Payment)
Official Order Placement
flow2 Commitment to Quality Control
Translation Begins
A translator with the right expertise and style will handle the task.Review by Quality Assurance Specialist
Native Review with Verification by the TranslatorFinal Review
Final Verification with the CoordinatorDelivery
Inspection & Acceptance
We provide a **one-week review period** after delivery to accommodate requests and revisions.Final Approval
Invoice Issuance (For Post-Payment)
※ Transactions are limited to corporate clients only.
※ Payments from overseas corporations are restricted to advance payment only.
Frequently Asked Questions (FAQ)
What is the preferred format for the source document?
Please provide the source document in text format (text data).
We accept text documents in Word, Excel, PowerPoint, and other similar formats. Additionally, we can work with PDFs and DTP files (before outlining) as long as the text data is accessible.
If your document contains images or diagrams that cannot be converted into text, please contact us in advance.
[Website Translation]
Providing only a URL makes it difficult to determine the exact scope of translation. Please prepare a text document with the required content
[Subtitle & Narration Translation]
Please provide a text script for translation. If transcription from video or audio is required, additional fees will apply. Kindly consult us in advance.
- Click here for the Quotation & Inquiry Form.
Can I request revisions after the final approval?
At NAIway, the final approval is considered complete after a one-week review period following delivery.
Revisions requested after this period may incur additional charges.
However, if any obvious mistranslations are found, we will promptly correct them free of charge.
Which languages are supported for machine translation (AI translation)?
Currently, we support English-to-Japanese and Japanese-to-English translation.
However, AI translation combined with expert review is often possible for other languages as well, especially when English is used as an intermediary.
Can I cancel my order midway?
Cancellation is possible; however, a cancellation fee will apply.
The fee will be based on the work already completed by our team, including translators, quality controllers, and our staff.
Can you handle industry-specific terminology?
Yes. A specialized translator will review the content to ensure accurate usage of industry-specific terms and expressions.
If you provide predefined translations or reference materials in advance, our expert translators will use them as a basis for the review process.
Can I choose the translator?
Yes. If you would like to request the same translator as before, please provide their translator ID. We will check their availability and make arrangements accordingly.
However, if scheduling conflicts arise, we may not be able to accommodate your request. We appreciate your understanding.
We are committed to providing
meticulous and thorough service.
Please share your requirements with us.
Our motto is "Bridging different cultures and languages to bring smiles to people."
With this mission in mind, we strive every day to deliver the highest quality translations.
Please share your requirements with us.
We are here to assist you with translation, proofreading, and more.
Translation Policy & Terms of Acknowledgment
Quotation & Inquiries
If you have any questions regarding our services or would like to request a quote, feel free to contact us at any time.