J-volunteer is an online volunteer application platform presenting volunteer opportunities for Osaka Marathon 2027. The site provides information and tools for people interested in supporting the event, including a way to create an account, log in, review application instructions, search for volunteer opportunities, and access a personal page. It also offers a frequently asked questions section and contact information for inquiries.

The featured campaign calls for 10,000 volunteers and directs visitors to submit applications through the site. According to the published details, Osaka Marathon is scheduled for February 28, with applications open until November 30 at 11:59 p. m.

; recruitment may close earlier if the available places are filled. J-volunteer’s role, as described on the page, is to serve as the online destination for volunteer applications and related information. Its navigation and account features are focused on helping prospective volunteers find opportunities and manage their participation in the application process