# Bombardier Transportation x Hitachi High-Speed Trains revision history

Append-only Arc G field-change log. Forward-only honesty: events accrue from Arc G adoption.

Partnership: [Bombardier Transportation x Hitachi High-Speed Trains](/partnerships/bombardier-transportation-x-hitachi-high-speed-trains.md)

## Recorded posture

- First recorded event: 2026-08-22
- Last material change: 2026-08-22
- Material event count: 1
- Editorial event count: 0

## Forward-only note

Arc G is forward-only. The event log accrues from the Arc G adoption point. Fields with no events post-baseline equal the current cached value and are not independently verified at any prior date.

_Canonical URL: /partnerships/bombardier-transportation-x-hitachi-high-speed-trains/history. REST: /v1/partnerships/07b09286-5e56-40f3-8655-709d4615c9e8/history. HTML: [/partnerships/bombardier-transportation-x-hitachi-high-speed-trains/history](/partnerships/bombardier-transportation-x-hitachi-high-speed-trains/history)._