Our Engineering Architecture
How Japan Toll Receipts works with the ETC Usage Inquiry Service (MEISAI)
The engineering behind the platform — not a customer walkthrough. It explains, layer by layer, how a centralized control plane, a single safety governor, and private workers coordinate controlled, scalable access to the ETC Usage Inquiry Service (MEISAI).
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Watch it live
The AI pipeline, directed by Sora — in real time
A customer request enters at the top-left and flows right through the queue, scheduler, database, report engine, safety governor and a worker (A–D) to MEISAI — then loops back left through central processing, analysis, status fan-out (PDF / Email / Dashboard) and consolidation, landing as an email back with the customer. Sora — Director of AI Operations — assigns each step and narrates progress live.
›A customer just requested a report — let’s get to work.
A customer just requested a report — let’s get to work.
SoraYYukiHHanaAAoiRRinSystem Diagram
How a request flows through the system
// Customers never access external systems directly — everything routes through Queue → Governor → Private Workers.
Safety Governor
Controls simultaneous activity, avoids spikes
JapanTollReceipts is designed with a safety governor that limits how many background sessions run at once. Rather than unlimited parallel activity, requests pass through controlled scheduling — designed to avoid traffic spikes and keep processing stable.
Even with many requests, only a small controlled number run at once — the rest wait safely. (Hover any part for details.)
Adding workers never automatically increases simultaneous external access. The governor is always in control.
Queue & Scheduling
Why requests are queued
Work runs at the most appropriate time.
Duplicate requests can be detected.
Requests are spread out, not run all at once.
Daily reports are not all pulled at once.
Manual/urgent requests can be prioritized.
Report status is easier to track.
Private Workers
Private worker processes
Internal capacity can grow; external access is always governed.
Data Integrity
Designed for traceability and integrity
Scaling Model
Scale in layers, keep the controls
Customer traffic, dashboards, settings, requests.
Queue, scheduling, Database, status monitoring.
Background processing, governed external access, delivery.
JapanTollReceipts is designed to scale internal capacity without removing the controls that limit simultaneous external activity.
Risk Controls
How we prevent common risks
Queueing, scheduling, and safety-governor controls limit how much background activity can proceed at one time.
The system checks for matching queued, active, or recently completed work before creating another job.
Workers still require approval from the safety governor before starting controlled background work.
Each workflow has status tracking so customers and administrators can see whether work is queued, processing, delivered, delayed, or needs review.
Failures can trigger delay, retry, pause, or review behavior instead of uncontrolled repeated attempts.
Report workflows are associated with customer, account, card, period, and delivery settings before reports are delivered.
Engineering FAQ
How do you prevent…?
Independent Service Notice
JapanTollReceipts is an independent service. It is not the ETC Usage Inquiry Service (MEISAI) operator, NEXCO, or a toll road operator. The platform helps customers organize authorized ETC usage records through a structured reporting workflow.