nikkijam.com

What It Is

nikkijam（ニッキジャム） is a Japanese online exchange-diary hosting service. It is not positioned as a typical enterprise SaaS product; rather, it is closer to a web diary platform for individuals and small communities. The page states that the service began in 1999 and operated until 2012, so users should verify its current availability for themselves. It lets users create an exchange diary through the website without needing to have their own personal homepage.

Core Features and Collaboration

The core product is “exchange diary rental/hosting.” Each diary supports up to 8 participants, making it suitable for friend groups, couples, or personal journaling. Members can write entries in sequence, and admins can add or remove members from the management page. The platform supports a private mode, where only people who know the password can view the diary, making it suitable for couples or private small circles. At the page level, users can customize the title, background color, text color, introduction text, background image, and more. HTML tags such as FONT and IMG are also allowed; however, images must first be uploaded to the user’s own server and then referenced via URL.

Pricing and Access

In terms of pricing, the page repeatedly states that exchange diaries can be used for free. There is no information about paid plans, enterprise editions, add-on features, or payment methods. The registration process relies on email confirmation, and the FAQ says that registrations using free email providers such as goo, excite, and Yahoo are not accepted; users need an email address issued by an internet service provider. This feels rather inconvenient by today’s standards. The page does not provide information about access from mainland China, so availability there is unknown.

Security, Data, and Limitations

Security features mainly consist of private mode, a private password, an admin password, and password recovery via the registered email address. The page does not disclose modern SaaS security information such as HTTPS, encrypted storage, backups, a privacy policy, or compliance certifications. Data limitations are significant: diaries that have not been updated for more than 30 days may be deleted, and deleted data cannot be recovered. This is an important risk for users who want to keep long-term records.

Pros, Cons, and Who It’s For

Its strengths are that it is free, focused in scope, does not require users to build their own website, and includes community discovery features such as search, rankings, latest diaries, and a member-recruitment bulletin board. Its weaknesses are that the product feels dated and lacks modern capabilities such as mobile apps, notifications, fine-grained permissions, APIs, and third-party integrations. It is better suited to nostalgic online diaries, private couple journals, or rotating writing among small friend groups. For long-term knowledge storage or team collaboration, alternatives such as Notion, 语雀, Feishu Docs, or Shimo Docs would be more reliable.