SEIGETSU
: How to use it, features, and the business problems it solves
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What is SEIGETSU?
An ideation-focused AI (formerly monju) where multiple AIs (currently 5 models) generate ideas in parallel from one theme, organized via five frameworks — mind map, mandala grid, SCAMPER, SWOT/TOWS. Exports to pptx/png/md. Paid tier currently suspended pending official release.
Business problems it solves
About "SEIGETSU"
What is SEIGETSU
SEIGETSU is an ideation-focused AI tool that runs multiple AIs in parallel to generate a large number of ideas from a single theme and organizes them into mind maps and various frameworks. The official line is "we expand your one line into graphs and slides in a minute," and its full name is Multi-AI Brainstorming SEIGETSU. It is run by Daisuke Yamaguchi (an individual).
Availability: SEIGETSU was renamed from its former name "monju." It is currently preparing for an official release, with the paid service suspended (official wording: "The paid service is suspended in preparation for the official release."). The free feature (mind map) is usable in the browser. No price figures are currently published officially (payment via PayPal, with pricing shown before purchase). The information below is as of August 2026.
SEIGETSU's core is having several selected AIs (currently 5 models) generate ideas at once. For one theme, each AI produces 5–20 ideas — 25–100 in total — then duplicates are removed and organized. It's a "generator" focused purely on generation, with no on-screen editing; you finish output in other tools.
How to use
Enter a theme, pick a mode and generate, then export in various formats.
Enter a theme
Enter the theme you want to explore in one line; AI can suggest themes too.
Pick a mode
Choose a mode that fits your goal, such as mind map or mandala grid.
Generate with multiple AIs
Five AIs produce ideas in parallel; duplicates are removed and organized.
Export
Export as PowerPoint (.pptx), image (.png), or Markdown (.md).
The free plan offers the mind map mode. All modes, parameter tuning, and the advice room are paid features — currently suspended.
Key features
01Parallel brainstorming with multiple AIs
Several selected AIs (currently 5 models) generate ideas simultaneously. One theme yields 25–100 ideas total, with duplicates removed and organized. You can also tune parameters like the number of ideas and the degree of freedom (temperature) — a paid feature.
02Five ideation modes
It offers five modes: mind map (also generates KJ-method affinity diagrams), mandala grid (8×8 = 64 ideas), Business Model Canvas, SCAMPER, and SWOT/TOWS (cross-SWOT). Pick the framework to suit your goal. There's also an "advice room" that suggests which mode to use.
03Export
Results can be exported as PowerPoint (.pptx), image (.png), or Markdown (.md), and copied to the clipboard. Since it's a "generator" that doesn't edit, you finish in other tools.
Pricing
It is currently preparing for official release, with the paid service suspended, so no specific pricing is published officially. The disclosed feature difference (no figures) is: Free = mind map mode only; Paid (premium) = all modes + parameter tuning + advice room. Payment is via PayPal, with pricing shown before purchase. Check the official site for the latest availability and pricing (as of August 2026).
How it differs from other ideation / visualization AI
SEIGETSU stands out for going all-in on "volume and framework" — running multiple AIs at once to produce many ideas and organizing them into ideation frameworks. That's a different aim from tools centered on a single AI conversation or on polishing/slide-making.
| Aspect | SEIGETSU | Napkin | Felo |
|---|---|---|---|
| Focus | Idea volume via multiple AIs | Text → diagrams | AI search + documents |
| Output | Mind maps, frameworks | Diagrams | Answers, slides, mind maps |
| Editing | Generation only (no editing) | Adjustable diagrams | Generation-centric |
Alternatives to compare include Napkin for turning text into diagrams, Gamma for AI slides, and Felo which goes from AI search to documents. If you want to generate a large volume of ideas and organize them by framework, SEIGETSU is a strong option (please check its availability above).
Information on this page is based on the official website as of August 2026. Please check the official site for the latest specs and pricing.
