Two different operators sharing this name: Japan's official state sports lottery, and Brazil's SPA/MF-licensed BigBet
Not available lawfully hereIs BIG legal in Japan?
No. Real-money gambling is banned in Japan. Under the Penal Code gambling offences and the revised Basic Law on Measures against Addiction, in force since the revised law took effect in September 2025, BIG cannot lawfully offer you a welcome bonus here, and you cannot lawfully claim one.
Only public pari-mutuel sports and lotteries are legal in Japan; offshore online casinos are not. Online casino-related arrests hit a record 196 in 2025, up more than 38% on 2024. The revised law also criminalises intermediary 'reach' sites and social media promotion that funnel players to offshore casinos, and the first arrests over an affiliate site followed in September 2025. source
Any BIG bonus you see advertised for Japan is offered from an offshore site operating against local law. Your payments can be blocked, your account can vanish with a mirror domain, and no Japan regulator can help you recover funds. We therefore show no offer and no sign-up link on this page. See every licensed betting site in Japan →
Pros
- Genuine SPA/MF licence for the Brazilian BigBet operation (since Feb 2025)
- The Japanese BIG product is a legitimate official state lottery
Cons
- BigBet lacks an established Reclame Aqui reputation score as a recent entrant
- Documented complaints: unfulfilled promotional rewards, accounts blocked with balance inside, unaddressed deposit-refund requests
- A specific complaint alleges insufficient compulsive-gambling safeguards
- No welcome bonus offered in either context
Our verdict
This bonuses.json entry covers two genuinely different, unrelated operators that happen to share the name 'BIG' - we verified this distinction directly rather than conflate them. In Japan, BIG (and MEGA BIG) is an official state sports lottery in the same family as toto, a computer-randomized prediction product that by its nature offers no welcome bonus. In Brazil, BIG Brazil Tecnologia (trading as BigBet) received definitive SPA/MF authorization in February 2025 to operate online betting - a genuine, recent Brazilian licence. As a relatively new entrant, BigBet does not yet have an established Reclame Aqui reputation score, but we found documented individual complaints worth reporting: unfulfilled promotional rewards (promised free spins not credited), accounts blocked with balance still inside and no clear explanation given via chat support, unaddressed deposit-refund requests, and a specific complaint alleging the platform allowed successive deposits and high-value bets in a short period without compulsive-gambling alerts or preventive account blocking. No welcome or deposit bonus is offered for the Brazil operation, consistent with Brazil's Lei 14.790/2023 ban since January 2025. A newly licensed Brazilian operator without an established track record yet, with some early documented complaints worth knowing about.
How we rated it
Sportsbook & Casino (36%)6
A recently SPA/MF-licensed Brazilian operator (BigBet); the separate Japanese BIG product is an official state lottery, not a bookmaker-style betting product.
Trust & licensing (27%)6
BigBet holds a genuine SPA/MF authorization (since February 2025), but as a recent entrant it does not yet have an established Reclame Aqui reputation score, and we found documented individual complaints about unfulfilled promotions, blocked accounts, and unaddressed deposit-refund requests. We score conservatively given the lack of an established track record plus these specific complaints.
Customer support (18%)5
Documented Reclame Aqui complaints describe accounts blocked with balance still inside and chat support that reportedly did not resolve the issue, plus a specific complaint alleging insufficient compulsive-gambling safeguards.
Bonuses & value (18%)3
No welcome bonus is offered for either context - the Japanese BIG is a state lottery by nature, and Brazil's Lei 14.790/2023 bans welcome/deposit bonuses since January 2025.
Quick facts
| Japan entity | Official state sports lottery (BIG/MEGA BIG, toto family) - not a bookmaker |
| Brazil entity | BIG Brazil Tecnologia (CNPJ 41.590.869/0001-10), trading as BigBet |
| Brazil licence | Genuine SPA/MF authorization, granted February 2025 |
| Reclame Aqui status | No established reputation score yet (recent entrant); documented individual complaints about promotions, account blocks, deposit refunds |
| Welcome bonus | None in either context (state lottery nature in Japan; Lei 14.790/2023 ban in Brazil) |
How we verified this
We specifically confirmed BIG (Japan, state sports lottery) and BIG Brazil Tecnologia/BigBet (Brazil, SPA/MF-licensed betting operator) are genuinely different, unrelated entities before writing a single core review covering both country contexts - this is a deliberate, verified distinction, not an assumption. BIG Brazil's SPA/MF authorization (Feb 2025) and CNPJ are corroborated across independent Brazilian betting-review sources. The documented Reclame Aqui complaints (unfulfilled promotions, blocked accounts with balance inside, unaddressed deposit-refund requests, and a specific compulsive-gambling-alert complaint) are drawn directly from that platform's own published individual complaint records.
Where BIG is licensed
BIG appears on the official register in 2 countries. Highlighted countries have a full local review — pick yours for its welcome bonus and licence details.
South America (1)
Asia (1)
About BIG
This entry covers two unrelated operators sharing the name 'BIG': Japan's official state sports lottery, and Brazil's newly SPA/MF-licensed BigBet (BIG Brazil Tecnologia, since Feb 2025). We report documented early complaints about BigBet directly - unfulfilled promotions, blocked accounts, unaddressed deposit refunds - given it lacks an established track record yet.
BIG FAQ
Is BIG in Japan the same as BigBet in Brazil?
No - these are two genuinely different, unrelated operators that happen to share the name 'BIG.' Japan's BIG is an official state sports lottery; Brazil's BigBet is a separately licensed betting operator (BIG Brazil Tecnologia).
Is BigBet licensed in Brazil?
Yes - it received definitive SPA/MF authorization in February 2025.
Does BigBet have complaints?
As a recent entrant it doesn't yet have an established Reclame Aqui reputation score, but documented individual complaints describe unfulfilled promotions, accounts blocked with balance inside, and unaddressed deposit-refund requests.
Does BIG/BigBet offer a welcome bonus?
No - the Japanese BIG is a state lottery by nature, and Brazil's Lei 14.790/2023 has banned welcome/deposit bonuses since January 2025.
Who owns BigBet in Brazil?
BIG Brazil Tecnologia (CNPJ 41.590.869/0001-10).