釜 本 事 務 所
OFFICE ＫＴＫ
For inquiries or information
TEL: +81-80-1928-8778
（売り込み営業、返信情報なしの利用は厳禁です。
Sales pitches and/or use without reply information strictly prohibited.）
Business hours
9:00 ~ 17:00 (Monday ~ Friday)
Office KTK was established in Onomichi-city, Hiroshima in Japan in 1977 as a translator's and interpreter's office for SMEs. Since then we have served for many companies, groups and individuals with its business policies of contribution to internationalization, natural environment and local communities.
KEC Inc., the predecessor of Office KTK, has been an electronic and chemical technology development company and it worked on developing the electricity saving technologies and the devices (named SOD) between 1994 and 2012. It won Energy Conservation Award in 1997 as the smallest company ever, and the technology has been transferred to NTT-AT.
The SOD also has received two other prominent awards, making us a triple awards winner.
This SOD technology has now been applied to Internet SOD as IoT (Internet of Things) as well. （Introductory video at the exhibition）
Notice: The homepage site of KEC Inc. （www.kec-intl.com) and its E mail address were closed on December 31, 2013.
Currently, we are focusing on the development of compact, high-efficiency photovoltaic power generation and energy storage systems.
What is SOD? Watch, listen and check it at the following sites, please.
TV introduction on NHK
in Japanese
Radio introduction in Gifu
in Japanese
Introduction by KTK
in English
Example of overseas introduction (booklet of the German Federal Environment Agency)
Serial Introduction of SOD development on Internet books
Wow! Here comes Setsuden-mushi!
Trajectory of Energy Conservation Grand Prize-winning Technology Development
The expression "Sustainable Development Goals" (SDGs) has been often used these days, but our office, OFFICE KTK, was already working on SDGs in 1994 with the development of energy-saving technology.
SOD was calculated its environmental impact using the life cycle assessment method and also evaluated for its environmental impact reduction effects by itself, which led to Type III EcoLeaf environmental label certification as the 3rd one in Japan,
Global climate change prevention
Compact, high-efficiency solar generation and storage system
DIY Local production ＆ consumption of electricity (at home)
「Comparison with conventional systems」 「Workshop for DIY work」
Compact, high-efficiency solar generation and storage system with automatic solar tracking
Conventional rooftop solar generation system
Global environmental protection, carbon dioxide emission reduction, and abnormal weather stop can be achieved at home by your concrete actions using this this system.
Know-how will be made available free of charge.
We are looking for collaborators (companies) in research, development, prototyping, manufacturing, and use by DIY!
← Check it out in the video.
Automatic Electricity Saving (Power off) Outlet
Only one technology since 1994 SDGs Free testing available
This technology achieves zero standby power, which cannot be overcome by digital technology.
Please use this technology to develop new products and/or services and to improve existing products and/or services.
For more information, please click here.
Remote Power Controller (switch, SOD)
Only one technology since 1994 SDGs Free testing available
This SOD technology is now available for free testing as Remote power controller.
Private English lesson on line
"Online English learning support" and Tour Guide for non-Japanese are available at Office KTK as the language related business.
EIKEN 1st Graders' Network in Japan
Only one network of this kind in Japan, Volunteer activity
On April 12
TV coverage on
EIKEN 1st Graders' Network
Free English learning society
Overseas business activities
The following pictures show the overseas and its related activities.
Other business fields and activities
This website also has a blog page, hobby pages, regional volunteer activity pages as well as TV and radio program production recorded pages.
Notice: The homepage site of KEC Inc. （www.kec-intl.com) and its E mail address were closed on December 31, 2013.
STEP 1st Graders Network
Volunteer activity
Free English Learning Society
Volunteer activity
Classic guitar playing
Hobby activity
Introduction of media coverages
Introduction by videos
Career history (Karl Kamamoto)
Hobby introduction (Karl Kamamoto)
Volunteer & Hobby (Karl Kamamoto)
More pictures are here.
Introduction of music activities
Please listen to those while surfing our home pages.
Music Space 2010, an original guitar music for us,
compsed by A. Kitagawa, a guitarist
La Playa Barcarole Feste Lariane
Recuerdos de la Alhambra Amazing Grace
Lagrima II Ferroviere Dream of Love No. 3
Song of Life (with piano accompaniment）
Feste Lariane 2021 Sake yo Solamente Una Ves
played by the site owner, Karl Kamamoto
L' estro Armonico / SORA,
a classic guitar group, Karl Kamammoto
News updates
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Sept. 20, 2024 |
Global warming by standby power consumption of land line phones |
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Sept. 17, 2024 |
Corporate and technical tours for foreigners, newly established |
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Sept. 14, 2024 |
Only One & Number One Companies in Mfg. in Hiroshima renewed |
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Sept. 09, 2024 |
Tour guide (3 days) record for Americans in Hiroshima prefecture |
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Sept. 02, 2024 |
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August 08, 2024 |
Compact, high-efficiency solar power generation and storage system in Video |
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June 01, 2024 |
Development of more efficient solar generation system |
| May 07, 2024 | New career history of Karl T. Kamamoto |
| April 20, 2024 | Himawari Music Festival finished its activity since 2012. |
| April 07, 2024 | Newspaper coverage of Eiken 1st graders' Network in Japan |
| Feb. 20, 2024 | New homepage for Japanese products overseas |
| Jan. 27, 2024 | Visting Guitar Performance 2024 - 1 |
| Jan. 1, 2024 | A Happy New Year |
News in the past is listed here.
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Technical/company introduction, guitar performance program |
Book publication (technical development, English learning) |
HOME PAGE MENU, OFFICE KTK
Copyright©1994 - Office KTK All rights reserved.