姚 凱

An assessment service that maps business risk, startup costs, validation methods, exit criteria, licensing and legal considerations for individuals, small businesses and overseas founders entering Japan. The commercial funnel runs from a no-login free assessment to sign-up, saved results, paid detailed reports, PDF download and history. AI is limited to auxiliary explanations — risk scores come from a rule engine.

• Designed the conversion funnel: free assessment → free result → sign-up → paid report → PDF → history
• Separated scoring from explanation generation; scores come from a rule engine for reproducibility and transparency
• Assessments, orders, permissions, refunds and audit logs share one data model, operable from the admin console
• Included legal pages, refunds, data deletion and safety wording in scope — built to a publishable standard for Japan

Next.js App Router / TypeScript / Tailwind ・ React Hook Form / Zod ・ Prisma 7 / PostgreSQL ・ Stripe JPY ・ Vitest / ESLint ・ Session Auth / Masking / Legal Pages