What Is a Job Offer Letter? When It Arrives, What to Do If It Doesn't, and How to Respond

After passing the interview process, companies typically send a formal document called a job offer letter to confirm your hiring. However, many job seekers have questions: "When does the offer letter arrive?" "What should I do if it doesn't come?" "What's the difference between an offer letter and an employment conditions notice?" This article covers everything you need to know about job offer letters — from the basics to how to respond after receiving one.

What Is a Job Offer Letter?

A job offer letter is a formal document from a company officially notifying a candidate that they have been selected for a position. While there is no legal obligation to issue one, it serves as an important record that confirms the offer for both the employer and the candidate.

A typical offer letter includes the candidate's name, the date of the offer, the expected start date, a list of required documents, and any conditions under which the offer may be rescinded. Some companies also include an overview of employment terms.

Legal Implications of a Job Offer Letter

Under Japanese case law, a job offer is interpreted as a "labor contract with a deferred start date and reserved right of cancellation." This means that once an offer letter is issued, an employment contract is considered to have been established, and the company cannot unilaterally rescind the offer without justifiable reason.

On the other hand, candidates retain the right to decline the offer. Under the Civil Code, a resignation submitted at least two weeks before the start date is legally valid. However, as a matter of courtesy, it is best to notify the company as soon as you decide to decline.

Offer Letter vs. Hiring Notice vs. Employment Conditions Notice

During the job search process, you may encounter several similarly named documents. An offer letter and a hiring notice are essentially the same thing — companies simply use different names. An employment conditions notice, however, is a legally mandated document under the Labor Standards Act that specifies wages, working hours, job duties, and work location.

An offer acceptance letter is a document in which the candidate confirms their intent to join the company. It is typically sent alongside the offer letter and must be signed and returned.

When Does the Offer Letter Arrive?

For mid-career hires, the offer letter is typically issued within three days to one week after the final interview. However, depending on the company's size and internal approval process, it may take two weeks or longer.

The most common pattern is receiving a verbal or email notification first, followed by the formal written offer letter via mail or email attachment. In recent years, digital delivery through email or online tools has become increasingly common.

What to Do If the Offer Letter Doesn't Arrive

Some companies don't issue formal offer letters at all since there is no legal requirement to do so. If you haven't received one, politely ask the hiring contact whether an offer letter will be issued. If a formal document isn't possible, request email confirmation as a written record of the offer. This is especially important when deciding the timing for resigning from your current position.

How to Respond After Receiving an Offer Letter

Upon receiving the offer letter, carefully review the start date, list of required documents, response deadline, and any conditions for rescission. If everything looks good and you're ready to accept, promptly send a reply expressing your gratitude and acceptance.

If you're still interviewing with other companies and need more time, it's best to ask for a deadline extension by saying something like, "Would it be possible to give my response by [date]?" Be honest about the reason while showing a positive attitude toward joining.

Employment Conditions Checklist Before Accepting

Before accepting an offer, make sure to review the employment conditions notice. Key items to verify include employment type, salary and bonus details, work location, working hours and overtime expectations, holidays, probation period terms, and social insurance enrollment. Cross-referencing these with what was discussed during interviews helps prevent post-hire mismatches.

Try the Workplace Before Accepting — With a Trial Job

Even after reviewing the offer letter and employment conditions, uncertainty about whether the workplace is truly right for you is natural. The atmosphere, actual job duties, and team chemistry — things documents can't convey — are what truly determine your satisfaction after joining.

That's where "Otameshi Tenshoku" (Trial Job Change) comes in. It allows you to experience real work at a company before making a commitment, with compensation during the trial period. If you've ever received an offer letter and wondered "Is this really the right place for me?", consider exploring a trial-based approach for your next career move.

Summary

A job offer letter is an important document signaling that you're near the finish line of your job search. Understanding when it arrives, what to do if it doesn't, the differences between related documents, and how to respond properly will help you smoothly prepare for your new role. Always review the employment conditions in detail and make sure you're fully satisfied before taking the next step in your career.