TRPG Onsen is the official app for "TRPG Onsen (trpgsession.com)," Japan's largest comprehensive online TRPG session SNS.
With over 10 years of operation and tens of thousands of players, enjoy the largest TRPG community in Japan anytime, anywhere, from your smartphone.
Whether you're a GM looking to host a game, a player wanting to join casually, or someone who wants to carry their character sheet with them,
this single app lets you complete all aspects of TRPGs: "playing," "creating," and "communicating."
■ Recommended for those who:
・Are looking for people to play Call of Cthulhu TRPG with online
・Want to participate in Sword World 2.5, Insane, or Shinobigami sessions
・Want to GM their own scenarios and recruit players
・Want to manage and carry character sheets on their smartphone
・Want to read other players' replays and publish their own
・Want to interact regularly with fellow TRPG enthusiasts
■ Main Features
● Session Recruitment and Participation
・Session bulletin board compatible with over 500 TRPG systems
・Refine your search by date/time, system, voice/text, recommended number of players, etc.
・Complete the entire process from application to GM approval and cancellation
● Character Sheet Management
・Dedicated sheets for Call of Cthulhu TRPG 6th/7th Edition
・Dedicated sheets for Sword World 2.0/2.5
・Free-form input sheets (for any system)
・Built-in dice function; ability score determination is completed within the app
・Can register icons, images, and backstories
● Community & Interaction
* Community categorized by system and play style
* Easily interact through topics, threads, and comments
* Friend function, profile, and play record privacy settings
* Features to convey your personality, such as 100 questions
● Replays, Scenarios, and Rulebooks
* View and comment on replays posted by players
* Search for published original scenarios
* Post user-created original rulebooks
● Diary & Timeline
* Post daily records related to TRPGs
* Follow friends' posts on the timeline
* React with likes and comments
● Wiki
* Everyone edits TRPG-related rules, terminology, and system information
* Beginners can quickly find what they're looking for
● Voting Function
* Create polls convenient for scheduling and planning games
* Supports anonymous/named voting, deadlines, and multiple selections
● Push Notifications
* Instantly notify you of friend requests, comments, participation requests, and other notifications
* Tap a notification to directly navigate to the relevant screen within the app
■ Supported TRPG Systems (Excerpt)
Call of Cthulhu TRPG 6th Edition / 7th Edition, New Call of Cthulhu TRPG,
Sword World 2.0 / 2.5, Double Cross The 3rd Edition,
Insane, Shinobigami, Necronica: A Long Aftermath,
Yuuyake Koyake, Tokyo N◎VA,
and over 500 other systems including user-registered original systems.
■ Unique Strengths
- Over 10 years of operational experience, one of the largest active user bases in Japan
- Complete data sharing with the browser version (trpgsession.com), same account for PC and smartphone
- Free to use, no feature restrictions through in-app purchases
- Operated by TRPG players themselves. You can directly submit your requests to the management.
■ About Usage
・Free to use (includes in-app ads)
・Real-time sessions (Onsen Room) are linked to the browser version
・Supports login with Google account
・Account deletion is possible at any time via Settings → Delete Account in the app
■ Inquiries and Support
Please send your feedback and bug reports to the following:
・Email: trpg_session@yahoo.co.jp
・Website topic: "[Android App Version Requests/Bug Reports]"
■ Privacy Policy and Terms of Use
・Privacy Policy: https://trpgsession.com/privacypolicy.php
・Terms of Use: https://trpgsession.com/legal.php
・Child Safety Policy: https://trpgsession.com/child-safety.php
Japan's largest TRPG online social networking service. Official app supporting over 500 systems, free character sheet management, game room recruitment, and replay sharing.