AI will weave in expertise, terminology, and anecdotes from the selected profession
Add to existing character settings
Light plan+
🔒 Available on Light plan and above
Freely add personality traits, speech style, or catchphrases (up to 500 chars)
Fully customize this character
MAX / Own key
Freely edit all settings including personality and profession
🔒 Available on MAX plan or with your own API key
This text becomes the system prompt directly (up to 2000 chars)
Feed reference documents
MAX / Own key
🔒 Available on MAX plan or with your own API key
Added documents become the character's prior knowledge. Up to 50,000 chars total.
⚠️
Please read before use
Please refrain from entering settings closely resembling real individuals, as this may have psychological effects.
All text in this chat is AI-generated. Please use this feature with full understanding of that fact.
How to use
Mr. A
Mr. B
Click a name to remove or invite them back to the meeting
Mr. C
↑
Press "↑" to prompt that AI to speak without sending a message
Use "Character settings" to customize names, professions, and personalities
All participants in this service are AI. We do not guarantee the accuracy of their statements. Always verify with trusted primary sources before using generated information for decision-making.
Other features ①
Theme selection
Choose from 3 themes in SETTINGS.
☀️ Bright
🌙 Dark
💬 Talk
Break mode
Select "Take a break" during a chat to have participants stop work talk and relax. Enjoy casual conversation.
Select "Back to meeting" to return to meeting mode.
Other features ②
Restart a meeting from a specific point
If a discussion went off track, you can restart it from any point.
Click any past message to reveal the "▼ Delete from here down" button. Redo the discussion as many times as you like.
A
Mr. A — Default settings
A hardcore rationalist who values efficiency and cost-effectiveness above all
Quickly cuts to the core: "What's the actual goal?" "What's the ROI?"
Prioritizes feasibility and speed — a "ship it first" type
Concise and fast-paced in speech
Often adds conditions even when agreeing: "However..."
Log in to set name, gender & profession Light plan: add extra prompts MAX plan / Own key: fully customize from scratch
B
Mr. B — Default settings
A careful perfectionist focused on quality and completeness
Tends to flag concerns: "Are we sure?" "Have we mapped all the risks?"
Dislikes rushing; won't jump on ideas without evidence
Polite in tone but firm in stance
Once convinced, becomes a powerful driving force
Log in to set name, gender & profession Light plan: add extra prompts MAX plan / Own key: fully customize from scratch
C
Mr. C — Default settings
Broadly tuned in and highly trend-aware
Reacts genuinely to others ("Oh, I hadn't thought of that," "That's true")
Sometimes says things that are slightly off, but never with bad intent
High energy but can occasionally misfire
Casual and approachable; occasionally goes off on tangents
Log in to set name, gender & profession Light plan: add extra prompts MAX plan / Own key: fully customize from scratch
Feature Guide
Free
Paid
If you have an Anthropic API key
Free
What do you get by logging in?
Logging in with Google unlocks the following features.
Save conversations and resume them later
Attach PDFs, images, Excel, Word files to meetings
Access AI-generated meeting summaries
Customize participants with names, genders, and professions
Turn limit increases to 50/day (guest limit: 20 per 2 hours)
Paid ¥200
What is the 1DAY plan?
Unlocks unlimited Haiku turns for 24 hours from purchase. Other features remain the same as the free login tier.
Paid ¥490/mo
What is the Light plan?
Everything in the free login tier, plus:
Unlimited Haiku
Extra prompts for participants Fine-tune characters with custom instructions
Paid ¥1,480/mo
What is the MAX plan?
Everything in Light, plus:
Unlimited Sonnet (more powerful)
Feed documents (PDF, Excel, Word) to AI in advance AI enters meetings with your documents as prior knowledge. Up to 50,000 chars
Fully customize characters from scratch Completely override the default personality and set your own
For Anthropic API key holders
What is Own Key mode?
If you have an Anthropic API key (sk-ant-...), you can use all features without restrictions in Own Key mode.
Unlimited turns
Choose from all 3 models: Opus, Sonnet, Haiku
All features unlocked: document upload, extra prompts, and more
Fully customize characters from scratch
Enter your key in the "Own API Key" field in the SETTINGS panel and apply.
AIBS
AI BRAIN STORMER
Brainstorm with 3 AI characters at once
A
B
C
Click a participant to remove or invite them back at any time
2-30-8 Minami-Ikebukuro, Toshima-ku, Tokyo 171-0022, Japan
Phone
Disclosed upon request without delay
Email
contact@aibs.jp
Service name
AIBS (aibs.jp)
Price
1DAY ¥200 / Light ¥490/mo / MAX ¥1,480/mo (tax included)
Other costs
None (internet connection costs are the customer's responsibility)
Payment method
Credit card (Visa, Mastercard, American Express, JCB)
Payment timing
Light/MAX: charged on start date, auto-renewed monthly. 1DAY: charged immediately at purchase.
Service availability
Available immediately after payment is confirmed
Cancellation
Subscriptions can be cancelled anytime via "Cancel / Change on Stripe" in SETTINGS. Service continues until end of the current billing period. 1DAY purchases are non-refundable due to the nature of digital content.
Refunds
As a digital service, we generally do not offer refunds. However, exceptions may apply for significant service outages. Please contact contact@aibs.jp.
System requirements
Latest version of Chrome, Safari, or Firefox recommended
Fitnest Inc. ("we") handles personal information of AIBS users as follows.
Information we collect
Google account info (name, email, profile image), payment info (processed by Stripe; card numbers are not stored on our servers), usage history, access logs
Purpose of use
Service provision and operation, authentication, payment processing, improvement and development, customer support
Third-party disclosure
Shared with Google LLC (authentication), Stripe, Inc. (payments), and Anthropic, PBC (AI response generation), to the extent necessary for each service. No other disclosure except as required by law.
Click a name to remove or invite them back to the meeting
Mr. C
↑
Press "↑" to prompt that AI to speak without sending a message
Use "Character settings" to customize names, professions, and personalities
All participants in this service are AI. We do not guarantee the accuracy of their statements. Always verify with trusted primary sources before using generated information for decision-making.
