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■About us

Sunny Translation Service is a Japanese translation agency specialized in patent-related documents. We have been dedicated to provide high-quality translations  in many technical fields in several languages. Our clients include patent and law firms, and companies doing business globally. We promise to try our best to offer you the best translation service with our wide experiences in patent translation field.

■Features of our service


Our translation is made very carefully to meet your request and also in the most appropriate style according to the type of documents. Technical contents and terms are fully considered by translators and proofreaders to offer you a high-quality translation as a technical document. We have highly skilled and experienced technical translators in every technical field and we will choose the best suited translator for you request.

Proof reading

All translated documents are reviewed by our in-house proofreaders specialized in patent translation proofread to complete the translation. In addition, we are offering remarks from translators and proofreaders when there are any grammatical or technical errors in original text.

Our staff

All of our staff including sales staff have working experiences in patent and translation field. Our sales staff will listen to your voice carefully and will be a great support to offer you high-quality translation service.

■We offer services in: 

English German French Chinese(Cantonese/Mandarin) Korean Spanish Russian etc.


Translation Fee



Word count



per source word



per target word



per source word



per target word



per source word


3,000yen/ 400 letters

per target word


3,500yen/ 400 letters

per source word

(proof reading fee included)

■We are offering special discount for first-time customers.(English to Japanese:14yen/W, Japanese→English 20yen /W

■Example of delivery date for patent specification translation:
              English to Japanese→about 5000 words: 2 weeks
              Japanese to English→about 5000 words: 2-3 weeks
             * Feel free to tell us if you have an urgent case.  We will arrange our schedule as your requirement.

■Transfer fee will be charged separately.  (around 5,000 yen)

■Payment can be made through bank transfer or Paypal.

Documents we translate:

Patent specifications, Patent publications, Office actions, Remarks, Contracts, letters, etc.


Technical fields our patent translation services cover:

Machine engineering, Electric/Electronic engineering, Computer, IT, Chemistry,

Biochemistry, Medicine, Semiconductor, Material, Food, Business model etc.


<Contact Information>

Sunny Translation Service Co.,Ltd.

Kernel hill 1F, 333-2, Sanjo cho, Nakagyo-ku, Kyoto, 604-8205, Japan

■TEL / FAX  (+81) 75-585-5457

■E-mail  info@sunny-trans.com

■URL  http://sunny-trans.com

Business hour: 9:30am-6:30pm