Members Who Registered Books Show Increased Messages and Reactions: Bookshelves Emerge as Gateway to Community Engagement (OSIRO Survey)

OSIRO Inc., provider of the community-focused platform "OSIRO" (Headquarters: Shibuya-ku, Tokyo; CEO: Hiroyuki Sugiyama), has released an analysis of user data six months after launching its "Book Log" feature in 2025, which visualizes community members' reading records.

The survey analyzed 2,351 users across 65 online communities using OSIRO. Members who registered books showed significantly higher rates of increased community activity in the 14 days before and after registration, compared to non-registering members: 1.4 times more login days, 2.0 times more profile views, 1.6 times more reactions, and 1.9 times more messages. Unlike active content creation such as blogging or posting, the Book Log feature requires only registering books, making it an accessible form of self-expression even for members who find content creation intimidating. This ease of participation appears to be driving broader community engagement.

Observed Effects of the Book Log Feature After Six Months

Six months after its release, the Book Log feature—which visualizes members' reading records—has seen steady growth in book registrations, reaching approximately 80,000 entries as of early July 2026. It is becoming an essential tool for interaction and activation within OSIRO-powered online communities.

There are many ways to engage in online communities—writing blogs, posting updates, attending events. However, initiating conversations or reaching out to others often requires courage.

In contrast, the Book Log feature allows participation simply by registering favorite books. Registering and visualizing "books I like" feels similar to a personal introduction. This low-effort self-expression lowers the barrier to entry, making it easier for members who previously hesitated to post or comment to participate. As a result, the feature has gained widespread adoption.

Usage data indicates that this casual form of self-expression through personal bookshelves is becoming a catalyst for broader community engagement. Interest in other members grows through bookshelves, leading to more reactions and direct messages. This positive cycle is now reflected in measurable metrics.

Quantitative Impact of the Book Log Feature: Book Registration Drives Increased Activity

Members who registered books via the Book Log feature showed higher proportions of increased activity across all metrics during the 14-day period before and after registration, compared to non-registering members.

Specifically, the proportion of members showing increased activity was 1.4 times higher for login days (32.2% vs. 23.2%), 2.0 times higher for unique profile views (45.7% vs. 22.4%), 1.6 times higher for reactions (46.8% vs. 28.6%), and 1.9 times higher for messages (38.1% vs. 20.2%). Notably, non-registering members showed a general trend of declining activity across all metrics.

Case Study: Community Engagement Through Book Logs – "Wasei Salon"

Survey Overview

- Target: Existing members of online communities using OSIRO - Baseline Date: The date when the first book was registered in each community - Comparison Method: Activity levels over 14 days were compared between members who registered books and those who did not (with pre-period activity levels balanced across groups) - Metrics: Login days / Unique profile views / Reaction count / Message count

Three Key Effects of the Book Log Feature in Communities

- Bookshelves as a trigger to visit member profiles

Each member’s bookshelf is displayed on their profile page, creating a new reason to visit profiles. This increases motivation to view profiles and often leads to exploring others’ profiles as well.

- Visualizing members’ preferences sparks conversation

Making registered books visible fosters interest in other members, making it easier to initiate reactions and conversations.

- Lowered participation barriers

Unlike active posting such as blogs or microblogs, the Book Log feature is a low-barrier form of self-expression that simply requires registering books. This makes it easier for less vocal members to participate, broadening the base of community interaction.

Future Outlook

OSIRO will continue to enhance the Book Log feature to foster more natural, book-driven interactions. The company aims to bring the joy of reading—not as a solitary activity, but as a shared experience where members can exchange thoughts and feelings—to more communities.

About OSIRO Inc.

OSIRO Inc. operates under the mission of "making Japan a cultural and artistic powerhouse" by developing and providing "OSIRO," a community platform that connects creators, artists, companies, and organizations with their fans.

"OSIRO" emphasizes emotional sharing and human connections over mere information dissemination or content consumption. Through two-way communication and warm interactions, the platform excels at growing a community of empathetic supporters and fostering long-term relationships.