Hidaka Kikuchi

RAG Knowledge Base — PDF + Cited AI Chat https://ai.kaisei-global.com/rag Upload PDFs → members ask questions → AI answers with source citations. Stack: Next.js, Supabase pgvector, Gemini. Live demo.

Next.js Marketplace & Catalog MVP — Live Production Site Production luxury multi-vertical catalog I solo-built and maintain: listing grid, detail pages, inquiry/lead capture, and a Python data pipeline into Supabase.

Stack: Next.js, Supabase, Vercel. Live site — not mockups.

Same...

Native Japanese UI localization for SaaS and web apps — developer-ready JSON/CSV (next-intl, i18next), not Google Translate.

Deliverables: natural JP copy, EN→JP glossary with tone notes, placeholder and string-length checks so UI does not break.

~1,500 strings per sprint · 2...

https://contra.com/hidaka_kikuchi_7pzbrqfx/work?previewPortfolioProjectId=WyJQb3J0Zm9saW9Qcm9qZWN0Iiw0NjA5MTI5OV0%3D&r=hidaka_kikuchi_7pzbrqfx&referralExperimentNid=DEFAULT_REFERRAL_PROGRAM