OSHITOKI
Connect every fan moment to the next experience
A fan engagement SaaS that connects fan experiences before, during, and after events through a single ID, helping organizers build lasting relationships with fans. It delivers 88 screens for five user groups, including the fan app, operations console, venue check-in terminal, sponsor portal, and platform administration, on one shared foundation.
View service overview slidesUpdated: 9/2026
The video is in Japanese.
System Architecture
The apps for fans, venue staff, organizers, and sponsors all connect to one shared Core API. Data is stored in Neon, and notifications, email, and billing are handed off to external services.
Cloudflare Workers
- Fans, venue staff, organizers, and sponsors each use their own app to call the Core API.
- The Core API authenticates with Better Auth and connects to the Neon database through Hyperdrive.
- Images and files are stored in R2.
- Long-running work runs on Queues and Workflows and is handed off to Stripe, Resend, and Expo Push.
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Business Model
Organizers pay a subscription fee to run OSHITOKI and stay connected with fans before and after each event. Sponsors receive campaign results as anonymous aggregates.
- Organizers pay OSHITOKI a subscription fee and receive operating tools and fan data.
- Fans buy tickets and merchandise from organizers, attend events, and receive perks.
- Fans record visits and cheer in the app.
- Sponsors pay organizers for sponsorship and receive aggregated campaign results from OSHITOKI.
Drag to move the diagram. Click it first to zoom with the mouse wheel.
Drag to move the diagram, and use the buttons at the top right to zoom.
With a keyboard, use the arrow keys to move, + and − to zoom, and 0 to reset.
Key Features
We built the full journey from fan experience to operations, check-in, sponsors, and SaaS administration across 88 screens.
From event discovery to day-of guidance
The home screen presents recommended and upcoming events so fans can move from the list to details without getting lost. Event details bring together the date and time, venue, notices, venue guidance, and timetable links.
QR check-in and digital membership card
Fans can scan a venue QR code and show a digital membership card to staff. Check-in records accumulate as visit history and stamps in the fan passport, making continued participation visible.
Favorite creators, stamps, and missions
Fans can view creator profiles and related events, then save favorites. Missions tied to visits, QR scans, and survey responses lead to rewards, keeping fans connected after the event.
Operations dashboard
The dashboard shows member counts, visitors, same-day check-ins, and recent operations by tenant, brand, and event. It also supports period comparisons and CSV export.
Event timetable planning
Operators register each creator's appearance time, venue, and stage to build the event timetable. The schedule flows to the fan view and can also drive pre-event notices and time-change updates.
Fan CRM
Teams review registration details, membership status, favorite creators, and consent status by tenant. CSV import and export plus duplicate-candidate review bring fan data scattered across services into one ledger.
Fan and event analytics
Analyze metrics for members, visits, retention, favorite creators, notifications, and sponsor initiatives by tenant, brand, and event. Period comparisons and CSV export are supported, and aggregation is limited to non-identifying data.
Venue check-in and offline sync
Check-in terminals support both QR scanning and manual search by reception code. To keep reception running at venues with unstable connectivity, unsent data stays in a device queue and syncs in batches when the connection returns.
Sponsor campaign performance
The system aggregates participation, completions, and coupon use, giving sponsors a view of campaign results. Shared data is primarily anonymous aggregate data, and identifying information is limited to the consented scope.
Multi-tenant SaaS administration
Monitor contracted tenants, retention, API error rates, and failed notifications or webhooks across the platform. Tenant creation and suspension, plans, usage limits, and external integrations are managed in one console.
From event discovery to day-of guidance
The home screen presents recommended and upcoming events so fans can move from the list to details without getting lost. Event details bring together the date and time, venue, notices, venue guidance, and timetable links.
QR check-in and digital membership card
Fans can scan a venue QR code and show a digital membership card to staff. Check-in records accumulate as visit history and stamps in the fan passport, making continued participation visible.
Favorite creators, stamps, and missions
Fans can view creator profiles and related events, then save favorites. Missions tied to visits, QR scans, and survey responses lead to rewards, keeping fans connected after the event.
Operations dashboard
The dashboard shows member counts, visitors, same-day check-ins, and recent operations by tenant, brand, and event. It also supports period comparisons and CSV export.
Event timetable planning
Operators register each creator's appearance time, venue, and stage to build the event timetable. The schedule flows to the fan view and can also drive pre-event notices and time-change updates.
Fan CRM
Teams review registration details, membership status, favorite creators, and consent status by tenant. CSV import and export plus duplicate-candidate review bring fan data scattered across services into one ledger.
Fan and event analytics
Analyze metrics for members, visits, retention, favorite creators, notifications, and sponsor initiatives by tenant, brand, and event. Period comparisons and CSV export are supported, and aggregation is limited to non-identifying data.
Venue check-in and offline sync
Check-in terminals support both QR scanning and manual search by reception code. To keep reception running at venues with unstable connectivity, unsent data stays in a device queue and syncs in batches when the connection returns.
Sponsor campaign performance
The system aggregates participation, completions, and coupon use, giving sponsors a view of campaign results. Shared data is primarily anonymous aggregate data, and identifying information is limited to the consented scope.
Multi-tenant SaaS administration
Monitor contracted tenants, retention, API error rates, and failed notifications or webhooks across the platform. Tenant creation and suspension, plans, usage limits, and external integrations are managed in one console.
Project Overview
Technology Stack (12 technologies)
- Next.js (App Router)
- React Native + Expo
- React + TypeScript
- Tailwind CSS
- Hono + Zod + OpenAPI
- Better Auth
- Neon PostgreSQL + Drizzle ORM
- Cloudflare Workers (Hyperdrive / Queues / Workflows / R2)
- Stripe Billing
- Sentry
- Playwright, Maestro, and k6
- pnpm Workspaces + Turborepo
Implemented Features (8 features)
- Fan home and event discovery
- QR check-in, digital membership card, and fan passport
- Favorite creators, stamps, and missions
- Event operations and timetable planning
- Fan CRM, segmented messaging, and analytics
- Venue check-in terminal (QR scanning and offline sync)
- Sponsor campaign performance reports
- Multi-tenant platform administration
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