The short answer
What can a development account establish about borrowing, revision and team credit without turning an executive decision into sole authorship?
Evidence and interpretation
Keep the claim attached to the record
Each row answers a different part of the question.
| Record | Supported reading | Limit |
|---|---|---|
| Reference | DKW model identified. | Not every later feature. |
| Revision | Different transmission. | Not proof of sole authorship. |
| Styling | GK group credited. | Not the whole engineering team. |
Chronology
A timeline of the turning points
Direction
Motorcycle development directed.
Delivery
Completed shipment recorded.
Organisation
Separate company established.
Read the decisions in the account
Yamahaโs retrospective account identifies the DKW RT125 as its reference. The transmission changed from three gears to four, while a GK group developed the colour scheme.
These are not competing answers to โwho made it?โ They describe different work. A reference can shape a product without determining every later feature; a stylist can contribute without designing its transmission.
Sources for this section: [1]
Caption, delivery and organisation
The hall of fameโs image caption dates a YA-1 to 1954.
The corporate account dates a completed shipment to February 1955 and company separation to July.
A caption, delivery event and legal reorganisation need not refer to one instant. They should be attached to the event each source actually describes, rather than forced into a single invention date.
Original task: assign credit by function
Make five rows: reference model, mechanism, styling, testing and organisation. Use the selected account to place DKW, the engineering team, GK and Kawakami against relevant rows. More than one row can involve the same participant.
Now test this proposed caption: โOne executive designed every feature, and establishing a company proves every design decision was original.โ Identify two independent errors and write a replacement of your own. No workshop drawing or operating procedure is needed.
Sources for this section: [1]
Reference answer: several contributions can coexist
DKW supplies the reference; engineers revise the transmission; GK provides styling. The account places Kawakami in testing and the organisational decision. The caption wrongly collapses those contributions and infers originality from legal organisation.
A defensible replacement distinguishes the decision to enter a market from the work of developing a product. It preserves both reference and revision. The account is still a later company narrative: the task teaches a precise reading of that account, not independent verification of every test claim.
Sources for this section: [1]
Continue the chronology
Related history guides
Biography context
Explore Japan through connected lives
Connected biographies
The working life
Quick answers
Common questions
- Do different dates necessarily contradict each other?
- Only if they claim to date the same event or object stage.
Primary and institutional sources
How this history was checked
Compare the selected accounts and objects below; each has a stated date and scope, and the learning task supplies its own instructions. This article was reviewed on 31 October 2026.