Red flags, how to spot a black company before you sign

What a "black company" (ブラック企業 / burakku kigyō) actually is

The term emerged in the early 2000s to describe employers that systematically violate Japanese labour law, especially around working hours and unpaid overtime, and treat employees as expendable. The phenomenon is widespread enough that the Ministry of Health, Labour and Welfare maintains a public database of repeat-offender employers, and the 2018 Work Style Reform Law capped overtime at 100 hours/month and 720 hours/year in part to address it.

Common-sector concentrations: IT services (especially SI / system-integration), food service, construction, retail, low-end eikaiwa, and the "blackest" of all, certain healthcare staffing firms. Tech product companies, foreign-affiliated firms, and the major Japanese employers run by lifetime-employment culture are generally not in this bucket.

Red flags in the job listing itself

• "Family-like atmosphere" (アットホームな職場) / "We're a family": almost universally signals that boundaries don't exist. The team will expect after- hours drinking, weekend events, and personal-life intrusion.
• "Hard-workers welcome" (ガッツのある方) / "passionate people": Japanese HR code for "we don't pay enough but we want long hours anyway."
• "Energetic young workplace": read as either "we discriminate against older candidates" or "we burn through people quickly."
• Vague salary ("経験により" / "based on experience" / "negotiable"): sometimes legitimate at senior roles, but a foreign-friendly employer will give you a written range before scheduling an interview. Always ask.
• "Comprehensive overtime included" (固定残業代込み / 月20時間分の残業手当): A fixed overtime amount baked into the salary. If you exceed that hidden hour cap you should be paid for the excess, many black companies "forget" to do this. Always ask in writing how the fixed hours are calculated and what happens beyond them.
• "Probation period" of 6+ months: legal max is typically 3–6 months; anything longer is a warning sign that they intend to fire freely.
• Listings that have been posted for 6+ months continuously: the role is a revolving door. Cross-check with the company's hiring page archive.

Red flags during the interview

• They can't articulate the team structure or your direct manager. Disorganised reporting lines often track with disorganised everything else.
• They dodge questions about overtime. Standard answer at a healthy company: "We have a soft 40-hour week. Crunch happens occasionally and we pay for it." Black-company answer: "Our employees are passionate; everyone pitches in."
• The interviewer arrives late, cancels last-minute, or no-shows. One time can be a fluke. Twice is a pattern.
• They pressure you to decide same-day or next-day. Reasonable employers give you a week. Compressed timelines are how black companies prevent you from comparing offers or talking to people who'd warn you.
• You meet only the founder and no team members. Especially at small companies, the team being shielded from candidates is a strong signal.
• They ask intrusive personal questions. Marital status, fertility plans, family wealth, blood type, all illegal under the Equal Employment Opportunity Act but still happens at older Japanese firms. Walk.
• Salary suddenly drops between verbal offer and written contract. Aggressive pattern, they bait with a high verbal number then trim 10–20% on paper. Never sign immediately; ask for 48 hours to review.

What Japanese labour law actually requires (your protections)

• Working hours: standard week is 40 hours, 8 hours/day. Anything beyond is overtime and must be paid at +25% for the first 60 hours/month, +50% beyond that (since the 2023 amendment applied this to SMEs as well).
• Overtime cap: 45 hours/month normal, with an absolute ceiling of 100 hours/month or 720 hours/year under special agreement (the "36 agreement / 36協定"). Exceeding these limits is criminal, not just civil.
• Paid leave (有給休暇): minimum 10 days after 6 months of employment, rising with tenure. Since 2019, employers must force employees to take at least 5 days/year, refusing your paid leave is illegal.
• Resignation notice: 14 days by law if you're on an indefinite contract. Any contract clause demanding more than 14 days' notice is unenforceable. You can leave; they can sue but won't win.
• Wage payment: must be in cash (bank transfer counts) on time every month. Delayed or partial wages are immediate violations.
• Service overtime (サービス残業 / sābisu zangyō): unpaid overtime is illegal. Records of hours worked are legally required and you can demand copies.

Pre-signing checks, contract clauses to watch

• Fixed overtime amount (固定残業代 / みなし残業), confirm in writing how many hours it covers and the per-hour rate beyond.
• Salary breakdown: base + allowances should be itemised. A flat "monthly salary ¥X" with no breakdown often hides included overtime.
• Probationary period (試用期間): 3–6 months is standard. Confirm the salary during probation matches the post-probation salary.
• Non-compete clauses (競業避止義務): Japan's courts uphold these only if narrow in scope, time, and geography, and only if you're compensated. Broad "you can't work in this industry for 2 years anywhere in Japan" is unenforceable.
• Mandatory transfer clause (転勤命令権): Older Japanese contracts include the right to move you to any office in the country. Foreign-friendly employers and modern startups usually drop this; check it's not buried in a clause labelled 勤務地 (work location).
• "Resignation cooperation" clauses: any wording suggesting you must "obtain company consent" to resign is unenforceable but signals an employer that will try to make leaving difficult.

If you're already at a black company

1. Document everything. Keep a daily log of arrival and departure times. Screenshot Slack/Teams messages outside hours. These are evidence.
2. Pay into a separate savings account every month, having 6 months of runway means you can resign without immediate financial pressure.
3. Get medical attention if you're seeing physical symptoms. Stress- induced illness is a documented basis for emergency resignation and is sometimes treated as workplace injury.
4. Resign by registered mail (内容証明郵便). Sent to the company's official address with delivery confirmation. They cannot refuse it. The 14-day clock starts the day they receive it.
5. Talk to a labour lawyer if the company won't release your final paycheck, pension records, or 離職票 (resignation certificate). Initial consultation is often free.

Risks specific to foreign workers

• Visa pressure. Some black-company employers tell foreign workers "if you quit, you lose your visa." False, you have 3 months to find a new sponsor after a job change before your visa is at risk, and you can apply for a "Designated Activities" job-search status to extend that. Quitting does not automatically cancel your visa.
• "We hold your passport." This is a serious crime under Japanese law (involuntary servitude). If an employer suggests this, even informally, immediately contact your embassy.
• Tied housing. Some employers offer company-provided housing tied to employment. Eviction with 1 week's notice is common when you resign. Plan an independent rental before you give notice.
• "Cooperation pay" deductions. A few unethical employers deduct "training cost recovery" from your final paycheck if you quit before some date. This is illegal under Article 16 of the Labour Standards Act, which prohibits contracts that fix penalties for quitting.

Hidden red flags in modern job posts

The classic black-company signals (long hours, abusive bosses, withheld wages) still apply, but the modern set of subtle red flags in job postings:

• "アットホームな職場" (family-like workplace). The most-reliable single red flag. Often translates to "no boundaries, expect to socialise after hours, weekend events".
• "やりがい重視" (we value fulfilment). Code for "low pay, but meaningful work". Healthy employers offer both pay and meaning; employers who emphasise meaning over pay are signaling they can't compete on comp.
• "若手活躍中" (young employees thriving). Often means high turnover, only young employees because mid-career ones have left.
• "未経験歓迎" + senior salary on offer. Suspicious mismatch. Either the role is mis-described (it's actually low-skill) or the pay is contingent on impossible performance.
• "完全週休二日制" not stated; only "週休二日制" stated. 週休二日制 means "two days off in some weeks but not necessarily every week". Companies that mean "every weekend" specifically say 完全週休二日制. If they don't, expect to work some Saturdays.
• "みなし残業" (overtime included in base) with no specified hours. みなし残業 ("deemed overtime") is legal but must specify the number of hours included. If the listing says "残業代込み" with no number, assume unlimited.
• "裁量労働制" without specifics. Discretionary work systems are legal for specific job categories but commonly abused to avoid paying OT.
• No salary range, only "応相談" (negotiable). Increasingly considered a red flag, employers who refuse to share salary ranges typically pay below market.
• "自己啓発" (self-development) mentioned as a job duty. Often means "we expect you to attend training on weekends or after hours, unpaid".
• Always-hiring on every platform. Same job listing posted continuously for 6+ months on Indeed, Wantedly, LinkedIn, GaijinPot, Daijob, means people keep quitting.

Remote-work and post-pandemic red flags

• "Flexible / hybrid" but no clarity on how many days. Press for specifics. "Flexible" with no policy often means "manager's discretion" which becomes "5 days in office".
• Surveillance software requirement. If they require Hubstaff, Time Doctor, ActivTrak, or screenshot-based monitoring, strong negative signal regardless of nominal flexibility.
• "Always-on" expectations. Slack DM responses required within 15 minutes? Saturday client calls? Both red flags even at high-pay roles.
• No equipment stipend. A modern remote role at any reasonable employer covers laptop, monitor budget, internet allowance. Asking employees to expense back through reimbursement (or not at all) signals stinginess.
• "Return-to-office" planned without notice. Ask explicitly: "What's the policy on RTO, and what's the change-notice period?" Mercari / PayPay / Rakuten have all had unannounced RTO changes, being aware is the protection.

Forum due-diligence, Reddit, Glassdoor, OpenWork

Before signing, run the company through these checks:

• Glassdoor, global; many Japan companies have ratings here. Look at the "Pros / Cons" patterns over multiple years.
• OpenWork (旧Vorkers), Japan-specific. Free with one review contribution. Long-form Japanese reviews; translate with a tool if necessary. Most accurate single source for Japanese-language workplace culture.
• en-Lighthouse, En Japan's Japanese-language review platform; strong for traditional Japanese corporates.
• Reddit r/japanlife, search the company name. Strong honest sentiment, especially for English-teaching and IT firms.
• Reddit r/teachinginjapan, eikaiwa- and ALT-specific; search the company.
• TokyoDev forum / Slack, search the company. Many tech employees post candid impressions.
• LinkedIn, search current employees. Are most employees <2 years tenure? Are senior people leaving in clusters? These are tell-tale patterns.
• Hello Work labor inspector records, if a company has had labor violations published, the prefectural labor bureau may list them. Less accessible but worth checking for serious cases.

Contract / offer-letter red flags

When you receive an offer, the contract / 雇用契約書 should specify these clearly:

• Salary breakdown: base + bonus structure + any allowances. "Annual salary" alone is insufficient; ask for the breakdown.
• Working hours: start, end, lunch break, OT policy.
• Paid holidays: minimum 10 days in year 1 (legal minimum); 20 days is standard at modern employers; "consume by year-end" rules should be stated.
• Resignation notice: 30 days is legal default; some employers contractually require 60 or 90. Check.
• Non-compete clauses: increasingly enforced in 2025–26. Standard restrictions: 6–12 months, named-competitor list, paid garden leave. Unpaid 2-year non-compete? Red flag.
• Probation period: 3 months standard; some employers extend to 6. Probation salary should match permanent salary, not be reduced.
• Visa sponsorship should be explicit. The offer letter must state the employer commits to sponsoring the COE / visa application.
• Bonus formula: "decided by company discretion" is normal but historic ranges should be honest. Ask: "What was the bonus paid to people in this role last year?"
• Termination clauses: Japan provides strong worker protection. A clause allowing summary termination for "loss of company confidence" is legally weak but signals litigious employer culture.

If you're already in a black company, your exit plan

The 6-step exit plan:

1. Quiet preparation (Month 1–2). Update CV, rirekisho, English LinkedIn. Don't tell co-workers. Apply through personal email only.
2. Document everything (Month 1–3). Save copies of payslips, work schedules, overtime hours. If you have unpaid OT or harassment claims, these records are your evidence.
3. Apply broadly (Month 2–3). Mercari, PayPay, foreign-cap SaaS, Indeed Tokyo, FAANG Tokyo all hire continuously. Aim for 30+ applications.
4. Interview during PTO. Take paid leave for interview rounds, it's your legal right.
5. Get the offer in writing (Month 3–4). Wait until you have a signed offer before resigning. Don't accept verbal-only offers.
6. Resign formally (Month 4). Submit 退職届 (taishokutodoke, resignation letter) at least 30 days before exit date, by law that's all you owe. Use the formal phrase: "一身上の都合により、〇月〇日をもって退職 させていただきます."

If you're being harassed, threatened, or owed back-wages: contact the Labour Standards Inspection Office (労働基準監督署) at your prefecture. Free, multilingual support is available at Tokyo Labour Bureau's foreign-worker advice service (Mon–Fri, English / Chinese / Portuguese / Vietnamese / Tagalog). Backed by Article 5 of the Labour Standards Act, your employer cannot retaliate for filing.

Black-company checklist, score the offer

A "black company" (ブラック企業, burakku kigyō) exploits workers via illegal overtime, unpaid wages, harassment, and churn. Score an employer against these before signing, three or more is a serious warning:

• ☐ Job ad emphasises "passion," "family," or "young energetic team" but is vague on pay and hours.
• ☐ Salary band is suspiciously high for the role, sometimes because it bakes in heavy "fixed overtime."
• ☐ The same role is perpetually advertised (high churn).
• ☐ Reluctance to put hours, overtime policy, or holidays in writing.
• ☐ Glassdoor / OpenWork / JobHouse reviews mention unpaid overtime, harassment, or mass exits.
• ☐ Interviewers dodge questions about average monthly overtime or paid-leave usage.
• ☐ Pressure to decide immediately, or to start before paperwork is clear.
• ☐ "Everyone here works late" framed as a virtue.

Contract red flags to catch before signing

• "Fixed/deemed overtime" (みなし残業) hiding a low base, confirm the real base and what happens beyond the included hours.
• No written overtime policy or a "we don't really track it" answer.
• Probation traps, wildly lower pay or vague "evaluation" terms during a long probation (試用期間).
• Penalty/clawback clauses for leaving (training repayment, etc.), some are unenforceable, but their presence signals the culture.
• Visa leverage, any hint that they'll "hold" your visa over you. Your visa is yours; they sponsor it, they don't own it.
• Vague job scope that lets them reassign you to anything, including work your visa doesn't cover.

Interview tells that something's off

• They can't name a single thing employees like beyond "the people."
• The person who'd be your manager seems exhausted or evasive.
• No clear answer on why the role is open (backfill? growth? someone quit?).
• Discomfort when you ask about average overtime and paid-leave usage rates.
• The process is chaotic and disrespectful of your time, that's a preview of the job.

Recruiter & agency games

Most recruiters are fine; a few play games because they're paid on placement, not your happiness:

• Pressure to accept fast "before the role closes", legitimate roles rarely vanish overnight.
• Withholding the company name until you commit to interview, fine early, but you should know before final stages so you can research it.
• Lowballing your expectations "for the Japanese market", bring your own data (this site, TokyoDev survey, levels.fyi).
• Submitting you to roles you didn't approve, insist on consent before each submission, or you can get "burned" with a company you'd have applied to directly.

If you're already in a bad job

• You can quit. Standard notice is often 1 month (check your contract / work rules 就業規則); civil law allows resignation with notice even if they resist.
• Taishoku daikō (退職代行), paid "resignation agency" services will quit on your behalf if the employer is hostile or you can't face the conversation. They're widely used.
• Unpaid wages/overtime are recoverable, document everything (hours, messages, payslips).
• Don't let a bad job jeopardise your visa, line up the next role, and notify immigration of the change within 14 days.

Where to get help, free & official

• Labour Standards Inspection Office (労働基準監督署, rōdō kijun kantokusho), the government body for unpaid wages, illegal overtime, and unsafe conditions. Free.
• Tokyo / prefectural labour consultation hotlines, some offer multilingual advice.
• General unions (合同労組 / ユニオン), anyone can join individually (e.g. Tokyo General Union, General Union in Kansai); they help foreigners with disputes and collective bargaining.
• Legal aid (法テラス, Hōterasu), subsidised legal consultation.
• Hello Work (ハローワーク), public employment service; unemployment benefits if you paid employment insurance, plus job placement.