About Us

Another Langage: 日本語

We are a private business founded in 2019.

Due to the de facto dissolution of its predecessor, the music label GreenEchoes Studio, Kawamura, who had served as its representative, took over its name and started it as a website management business.

Business Activities and Philosophy

Our mission is to provide services that satisfy our users.

We satisfy your intellectual curiosity by aggregating and disseminating original information on the Internet.

Main Businesses

Support for setting up and managing owned media using WordPress, etc.
Supervision and fairness of line-related articles such as pocket WiFi, smartphones, cheap SIM services in general, and optical (fixed-line) lines
Writing circuit-based articles as a web writer
Disseminating keyboard information through our media ” GreenKeys “.
Review of gadgets such as keyboards and advice on product development from the user’s perspective

Click here to view our portfolio as an author and supervisor.
Click here to learn more about the media we operate and supervise.

About GreenEchoes Studio

Sole proprietorship business name	GreenEchoes Studio (GreenEchoes Studio)
the Dun & Bradstreet D-U-N-S® Number	718572009
Establishment	January 18, 2019
Location	2-1-5 Kandoji Minami, Chuo-ku, Niigata City, Niigata 950-0986, Japan
Name of Representative	Ryosuke Kawamura ( Profile )
TEL	050-5361-9238 Please contact us via email or inquiry form.
mail (usu. in phrases like “e-mail”, “text message”, etc.)	info@greenechoes-studio.com
contact information (for inquiries) (e.g. corporate phone number)	Please click here.
Home Page	https://company.greenechoes-studio.com
Business Hours	irregular
Business	Website management, etc.
Press Release	GreenEchoes Studio｜PRTIMES

Business History

April 2012 – February 2018 GreenEchoes Studio was established as a music label for the music band tone and released three mini-albums.
January 2018 After label hiatus, founded GreenEchoes Studio as a website management business in Niigata City
September 2018 – “Kawamoura’s Cheap SIM Switching Guide Center” begins operations.
January 2019 Registered as a sole proprietorship
March 2019 “Kawamura’s Cheap SIM Switching Guide Center” renamed to “Denpa Choice Navi”.
March 2020 Name changed from “Denpa Choice Navi” to “GreenWaves
Oct. 2020 Release of ” Mobile WiFi Custom Search ” function
December 2020 URL changed from waves.greenechoes-studio.com to greenwaves.jp
February 2021 Release of ” Smartphone Switching Consultation Center Online ” and ” Smartphone Switching Fee Simulator
March 2021 “Smartphone Switching Consultation Center” and “Smartphone Switching Simulator” appear in the media ” Saizowoman” / ” BCN+ “.
April 2021 Published in the media ” Manek Guide (Seiby Co., Ltd.)
July 2021 Appointed as general site director/writing supervisor for AiR-WiFi Magazine (operated by FREEDiVE, Inc.)
September 2021 Supervised articles for Professional Gems (managed by NEXER Co., Ltd.)
October 2021 Appointed as Writing Supervisor/Site Director for WiFi Pman (operated by Niche Company, Inc.)
November 2021: Representative Kawamura appointed as Lenovo Ambassador
November 2021 Supervision at Iroha Net (operated by Space Agent Inc.)
Feb. 2022 Supervised articles for the entire Net professional (GMO Internet Group Inc.) website.
February 2022 Awarded Lenovo Ambassador MVP
Feb. 2022: Representative Kawamura appointed as NURO Mobile Ambassador.
April 2022 Appointed as Writing Supervisor/Site Director for MasterNet (operated by Niche Company, Inc.)
April 2022 Writing Supervisor at UQ WiMAX (UQ Communications Inc.)
September 2022 Launch of ” GreenKeys,” a media specializing in keyboards
December 2022 Pickey’s (rentry, Inc.) ” ahamo ” review article supervised by
March 2023 Supervised by Professional Gems (NEXER Co., Ltd.)
April 2023 Supervisor for Pickey’s (rentry, Inc.) ” OCN Mobile ONE ” and ” NURO Mobile ” review articles.
September 2023 povo library｜”Education costs can be saved! How to Review Communication Costs for Tablet Learning” Supervisor for the article “How to Review Communication Costs for Tablet Learning”.
January 2024｜An interview with the supervisor ( 10 questions about fiber optic lines/10 questions about pocket WiFi/10 questions about cheap SIMs ) will be published in MOBA LIFE (Smart Mobile Communications Co., Ltd.).
February 2024 End of alliance with Niche Company, Inc. through media management
March 2024 Participated in the first Keyboard Market Tokyo as media press
March 2024 Start of performance-based advertising agreement with Cerakey
March 2024 Start of performance-based compensation agreement with Keyreative
March 2024 Sequence pattern for Ortholinear Kit for KAT Operator to be released by Keyreative.
April 2024 Lofree handles press release in Japan for Egde, which began crowdfunding on April 25 (PRTIMES)
May 2024 Review handsets for DoRACOON, a mobile communication service using cloud SIM technology provided by NTT Media Supply (YT40/YT65)
May 2024 Participated in the keyboard meetup event ” Tenkey Vol. 6″ as media press
May 2024 Started business alliance with ” KIBU Corporation “, a sales agent of Wobkey/DOIO, etc., through performance-based advertising.
May 2024 Received an order to contribute to ” HHKB Life ” by PFU Media Inc. as a subcontractor.
June 2024 Started business alliance with ” Sanyo Godo Kaisha “, Japanese distributor of NuPhy and Lofree, through performance-based advertising.
July 11, 2024 – PFU Corporation contributed to the July 11, 2024 issue of HHKB Life titled ” Pointing Stick or Trackball? Introduction to the usage scenarios ” contributed to the article “Pointing Stick or Trackball?
September 10, 2024 ” Explanation of Keycap Profiles, Types and Printing Methods ” contributed to “HHKB Life”, a media operated by PFU Corporation, is published.
September 18, 2024 Formed business alliance with FKcaps through performance-based advertising
October 3, 2024 Press release issued by PRTIMES regarding the release of replacement keycaps exclusively for HHKB Studio.
January 10, 2025 Launch of in-house e-commerce site ” Greenkeys Shop
January 25, 2025 ZEERA receives review request for ZEERA MacForge Gen2 case for Mac mini m4
Submitted by PRTIMES on February 3, 2025 for sale of Gravity36
February 9, 2025 Started selling Gravity36, the company’s first self-made keyboard kit, on the company’s e-commerce site
March 18, 2025 Total number of kits sold for Gravity36 reaches 80 sets.
March 22, 2025 Sold “Gravity36” at the 2nd Keyboard Market Tokyo 2025 on consignment to Sanyo LLC / Collaborated with JizaiStyle to sell limited edition TRRS cables
March 22, 2025 Participated in the 2nd Keyboard Market Tokyo 2025 as press.
April 1, 2025 Started planning for Gravity45, the second installment of the Gravity series
May 1, 2025 Gravity36v2 release announced
May 4, 2025 Participate in Tenkaichi Keyboard Waiwai Kai Vol. 8 as press
May 6, 2025 Lofree Influencer Meeting in Tokyo (hosted by Lofree and co-sponsored by Sanyo Godo Kaisha), where he gave a lecture on “What we can do to convey the appeal of keyboards”.

List of Business Partners

the rest

List of Companies

The following companies have posted information about GreenEchoes Studio’s website. (in no particular order)