What this document is
Immigration has tightened up on dispatch cases because in many of them the paperwork says engineering work but the person ends up doing manual labour. This document is the host company's own pledge: they understand what Engineer status permits, and they will receive Immigration if inspected.
What it must show
- Immigration's 「派遣先用」 form
- Your name + the residence status applied for
- Host company name · representative · person in charge · date
- Signature + seal
Where to get it
As a rule, Immigration will NOT grant permission while the host company is undecided — settle it before you file. The ONLY exception: a new hire still in training who has not been assigned a placement. In that case submit instead: the training programme · a statement of working conditions setting out the scope of the work to come · the agency's pledge regarding dispatch · and [a pledge on deciding the host company](https://www.moj.go.jp/isa/content/001466362.docx). Once the host company is settled you must prepare this document straight away and keep it for the next renewal.
Notes
Is the host company reluctant to sign? Make clear it is Immigration's own form and only confirms that they understand what work you are permitted to do — it creates no obligation to employ you.