Shunsuke Nakagawa's profile on Product Hunt

About

I'm a 20-year-old engineering student in Tokyo, building consumer apps solo since I was 16. Right now I'm building PostShelf — a way to see how great products actually do social media, so you never have to start a launch post from a blank editor. I also built nudge, an AI auto-scheduler for students and freelancers, and Tripper, a travel itinerary tool that hit 1M+ views on TikTok. Building in public, shipping fast, learning out loud.

Badges

Tastemaker

Gone streaking

Gone streaking 5

Maker History

PostShelfA library of how great products do social media
Aug 2026
WarmListPaste a URL. Meet your first customer.
Aug 2026
nudgeDon't manage. Just do. AI schedules your whole week.

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Joined Product HuntApril 20th, 2026

Forums

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22d ago

PostShelf - A library of how great products do social media

Filter real posts from products that made it by the moment each one was made for — launch, milestone, build in public, hot take — across X, Instagram, TikTok and Reddit. Every post is the platform's own live embed, credited and linking back. Free to search.

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2mo ago

WarmList - Paste a URL. Meet your first customer.

Paste your product URL. WarmList scans 500+ public X posts and finds people already describing the pain you solve, asking for alternatives, or inviting makers to share their products. Each match includes the original post, a fit score, and why it matters. $9 one-time. Results in ~10 minutes.

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2mo ago

nudge2.0 - AI schedules your whole week to take action

Don't manage. Just do. nudge plans your week so you don't have to - Don't create. Type plain text — AI turns it into real tasks with deadlines. - Don't plan your day. One click, AI schedules around sleep, meals, and fixed events. - Don't let yourself off. Lock $5 on a deadline. Finish and prove it — you pay nothing. - Don't switch apps. Capture and reschedule from Slack & Discord. - Don't get lost. One workspace. $5 first month, then $20/mo. Solo-built by a 20yo engineering student in Tokyo.