JLA is a “self-declaration type” framework that aims to clarify the compatible classes JLA-450 / JLA-425 (space bar length x stabilizer fulcrum span) of the Japanese layout bottom row as a shared language, and to promote the distribution of replacement parts and long-term support.
Individual product examinations are not conducted.
Participation Steps (Shortest)
- Submit the required information via the online application form (at the end of this page).
- Greenkeys (adjustment contact) will contact you regarding publication approval and notation confirmation.
- Registry listing (based on public agreement). Corrections will be made as needed.
- The “JLA-450” and “JLA-425” notation and badge can be used on your company’s website/product page.
Requirements for Self-Declaration
- JLA-450: Approximately 4.5u space bar length x approximately 70mm stabilizer fulcrum span
- JLA-425: Approximately 4.25u space bar length x approximately 60mm stabilizer fulcrum span
- Internal mechanisms, materials, and fixing methods are not questioned (each company’s know-how). Only the “position of the fulcrum (dimensions)” is shared.
- Split spaces (e.g., 2.25u+2.25u, etc.) are not covered (separate category)—not discouraged, but not covered by this alliance.
Notation and Badge
- Class notation is JLA-450 / JLA-425 (both supported is JLA-450/425).
- Please follow the guidelines for badge usage.
- If possible, please link to the JLA page.
- Details will be provided in the badge guidelines.
Policy for Listing on the Participating Organizations Page
- Listing is optional. Inclusion on the ‘JLA Participating Organizations List’ page is granted only if permission is obtained through the application form.
- The listing includes five items: logo, brand name, participation status, JLA class, and official URL.
- The participation categories are Founding / Participating / Review.
- Immediate correction/non-disclosure is supported even after listing.
How to Join
Before participating, please check that your keycaps and keyboard space bar dimensions meet the following standard values.
- JLA-450｜Space bar length 4.5u size / stabilizer interval approx. 70mm / key switch and stabilizer are placed on the same straight line
- JLA-425｜Spacebar length 4.25u size/Stabilizer interval approx. 60mm /Key switch and stabilizer are placed on the same straight line
The detailed specification table is currently under preparation.
Listing in the JLA-450/425 “List of Participating Organizations” will be made only after prior confirmation.
Enter and submit the required information such as brand/company name, contact person, official URL, desired status, and JLA class (JLA-450 / JLA-425)using the participation application form.
Immediately after submission, you will receive a confirmation email (in both Japanese and English). If there are any errors in the details, please let us know by replying to the email.
We will review your application (brand name and JLA class consistency, URL validity). We will ask additional questions if necessary.
If there are no problems with the application details, we will add a card to the List of Participating Organizations.
The card has an image + 2-column table (Brand/Company | Status | JLA Class | Official URL) configuration and is automatically reflected in the structured data (ItemList).
Please attach a badge to the product page that meets the JLA standards.
See the Badge Terms for details.
If the form does not work, please contact us via Contact Us.