Most Popular Online Casino Bonuses in March

ReloadBet

Online sports and casino betting · $300 welcome bonus!

Welcome offer:

100% Bonus up to

$300

Bonus on first deposit

Terms & Conditions apply ·  Play responsibly

Access restricted in the United States

We regret to inform you that ReloadBet is not currently accepting registrations from users in the United States.

Click to select your country and customize your experience 

ReloadBet

Online sports and casino betting · $300 welcome bonus!

  • 100% bonus up to $300 with your first deposit (New customers)
  • Japanese players are accepted
  • Accepts Bitcoin and other cryptocurrencies
  • Play directly in your browser – No software installation needed
  • Games for mobile devices · Play casino games on your smartphone or tablet
  • Live Casino · Play against real croupiers at ReloadBet
  • Online sports betting
  • Over $15,882,823 in Jackpots by Games Global
  • Tested and certified by Casino Bonus Center · Rating: 3.9/5
  • Popularity: This offer has been claimed by 515 visitors so far this month.
  • 32 Game Providers: Play n GO, 3 Oaks Gaming, iSoftBet, Salsa Technology, Yggdrasil Gaming, Evolution Gaming, Red Tiger, Spribe, BRAGG, Blueprint Gaming, Playtech, Vibra Gaming, and others.

*Please note that ReloadBet is not available in the United States.

Slotastic

Enjoy 50 Free Spins—No Deposit Required—Plus a 250% Bonus and 50 Extra Spins!

Sign-up Bonus:

50

free spins

No deposit required

Terms & Conditions apply ·  Play responsibly

Explore bonuses at Slotastic

Slotastic

Enjoy 50 Free Spins—No Deposit Required—Plus a 250% Bonus and 50 Extra Spins!

  • 50 free spins · No deposit required
  • 250% bonus up to $250 + 50 free spins with your first deposit (New customers)
  • Bonus available on your second purchase
  • Bonus available on your third deposit
  • Japanese players are accepted
  • Accepts Bitcoin and other cryptocurrencies
  • Play directly in your browser – No software installation needed
  • Games for mobile devices · Play casino games on your smartphone or tablet
  • Live Casino · Play against real croupiers at Slotastic
  • Tested and certified by Casino Bonus Center · Rating: 3.4/5
  • Popularity: This offer has been claimed by 475 visitors so far this month.
  • Game Providers: SpinLogic and Visionary iGaming

Desert Nights Casino

Immerse Yourself in an Oasis of Online Gaming with a Free $15 Bonus!

Free Bonus:

$15

No deposit required

Terms & Conditions apply ·  Play responsibly

Explore bonuses at Desert Nights Casino

Desert Nights Casino

Immerse Yourself in an Oasis of Online Gaming with a Free $15 Bonus!

  • $15 free! No deposit required
  • 100% bonus up to $1,000 with your first deposit (New customers)
  • Japanese players are accepted
  • Accepts Bitcoin and other cryptocurrencies
  • Play directly in your browser – No software installation needed
  • Downloadable games are also available
  • Games for mobile devices · Play casino games on your smartphone or tablet
  • Tested and certified by Casino Bonus Center · Rating: 3.1/5
  • Popularity: This offer has been claimed by 310 visitors so far this month.
  • Game Providers: Rival, Arrows Edge, Qora Games, DragonGaming, and Saucify

KikoBet

Unlock a €450 Welcome Package – Your Gateway to Premier Casino and Sports Betting Thrills!

Welcome offer:

100% Bonus up to

€200

Bonus on first deposit

Terms & Conditions apply ·  Play responsibly

Access restricted in the United States

We regret to inform you that KikoBet is not currently accepting registrations from users in the United States.

Click to select your country and customize your experience 

KikoBet

Unlock a €450 Welcome Package – Your Gateway to Premier Casino and Sports Betting Thrills!

  • 100% bonus up to €200 with your first deposit (New customers)
  • Bonus available on your second purchase
  • Bonus available on your third deposit
  • Japanese players are accepted
  • Accepts Bitcoin and other cryptocurrencies
  • Play directly in your browser – No software installation needed
  • Games for mobile devices · Play casino games on your smartphone or tablet
  • Live Casino · Play against real croupiers at KikoBet
  • Online sports betting
  • Tested and certified by Casino Bonus Center · Rating: 4.1/5
  • Popularity: This offer has been claimed by 265 visitors so far this month.
  • 26 Game Providers: Pragmatic Play, Spribe, Vibra Gaming, Salsa Technology, Evolution Gaming, iSoftBet, Yggdrasil Gaming, Casino Technology, Playtech, Gamzix, Play n GO, Foxium, and others.

*Please note that KikoBet is not available in the United States.

EnergyCasino

Enjoy 30 free spins plus a $400 welcome package

Sign-up Bonus:

30

free spins

No deposit required

Significant terms: 18+. 30 Free spins (Spins value: $0.10) on Book of Dead™ slot machine available once, to new customers who register at EnergyCasino using the promotional link. Maximum winnings $100. Spins expire after 7 days. · Terms & Conditions apply  ·  Play responsibly

Access restricted in the United States

We regret to inform you that EnergyCasino is not currently accepting registrations from users in the United States.

Click to select your country and customize your experience 

EnergyCasino

Enjoy 30 free spins plus a $400 welcome package

  • 30 free spins · No deposit required
  • 100% bonus up to $200 with your first deposit (New customers)
  • Bonus available on your second purchase
  • Japanese players are accepted
  • Play directly in your browser – No software installation needed
  • Games for mobile devices · Play casino games on your smartphone or tablet
  • Live Casino · Play against real croupiers at EnergyCasino
  • Over $15,882,823 in Jackpots by Games Global
  • Tested and certified by Casino Bonus Center · Rating: 4.4/5
  • Popularity: This offer has been claimed by 260 visitors so far this month.
  • 65 Game Providers: Pragmatic Play, NetEnt, NetGaming, Evoplay, Play n GO, Big Time Gaming, Merkur Gaming, NolimitCity, BF Games, Bally Wulff, Just for the Win, Iron Dog Studio, and others.

*Please note that EnergyCasino is not available in the United States.

Uptown Aces

350 free spins · Welcome bonus up to $8,888!

Free Bonus:

$20

No deposit required

Terms & Conditions apply ·  Play responsibly

Explore bonuses at Uptown Aces

Uptown Aces

350 free spins · Welcome bonus up to $8,888!

  • $20 free! No deposit required
  • 250% bonus up to $2,500 + 50 free spins with your first deposit (New customers)
  • Bonus available on your second purchase
  • Bonus available on your third deposit
  • Japanese players are accepted
  • Accepts Bitcoin and other cryptocurrencies
  • Play directly in your browser – No software installation needed
  • Downloadable games are also available
  • Games for mobile devices · Play casino games on your smartphone or tablet
  • Live Casino · Play against real croupiers at Uptown Aces
  • Tested and certified by Casino Bonus Center · Rating: 3.2/5
  • Popularity: This offer has been claimed by 209 visitors so far this month.
  • Game Providers: SpinLogic and Visionary iGaming

Zodiac Casino

80チャンスは億万長者になるために!

Welcome offer:

80

free spins

Bonus on first deposit

Terms & Conditions apply ·  Play responsibly

Access restricted in the United States

We regret to inform you that Zodiac Casino is not currently accepting registrations from users in the United States.

Click to select your country and customize your experience 

Zodiac Casino

80チャンスは億万長者になるために!

  • 80 free spins with your first deposit (New customers)
  • Bonus available on your second purchase
  • Bonus available on your third deposit
  • Japanese players are accepted
  • Accepts Bitcoin and other cryptocurrencies
  • Play directly in your browser – No software installation needed
  • Downloadable games are also available
  • Games for mobile devices · Play casino games on your smartphone or tablet
  • Live Casino · Play against real croupiers at Zodiac Casino
  • Over $8,661,371 in progressive jackpots
  • Tested and certified by Casino Bonus Center · Rating: 4.6/5
  • Popularity: This offer has been claimed by 199 visitors so far this month.
  • 39 Game Providers: Just for the Win, Area Vegas, SlingShot, Stormcraft, Blue Ring Studios, Snowborn Games, Triple Edge, Infinity Dragon, All For One, Ino Games, Real Dealer Studios, Barstruck, and others.

*Please note that Zodiac Casino is not available in the United States.

Top 10 Online Casinos in Japan (March 2025)

Expert-Rated Real Money Casinos with Top Bonuses

Looking for the best online casinos in Japan? Our expert team has tested and reviewed hundreds of real money gambling sites to bring you the top 10 choices for March 2025. Zodiac Casino, bitStarz, and King Billy Casino lead our rankings, standing out for their extensive selection of high-paying slots, immersive live dealer tables, exclusive bonuses, and lightning-fast payouts.

Browse our expert-ranked list below and claim your exclusive welcome bonus today!

Online Casinos JapanWelcome Bonus
80 free spins
Bonus of 100% up to ¥10,000 and 180 free spins
Bonus of 100% up to $500 and 100 free spins
Bonus of 100% up to $400
Bonus of 100% up to $300 and 100 free spins
Bonus of 100% up to $1,000
Bonus of 100% up to $100 and 50 free spins
150 free spins
Bonus of 100% up to $200 and 200 free spins
Bonus of 100% up to $200

* Terms & Conditions Apply ·  Play responsibly

With nearly two decades of experience in the industry, CasinoBonusCenter.com has been analyzing and comparing online casinos since 2006. Our dedicated team of professionals has handpicked the most trusted casinos for Japanese players to ensure you get the biggest sign-up bonuses, top-tier games, and the most rewarding loyalty programs.

Restrictions for the United States

Online gambling laws vary across U.S. states. Some have deemed it illegal, others have yet to address its legality, and a few have regulated and legalized it.

CasinoBonusCenter.com does not endorse or facilitate the use of its links or information in regions where it's considered illegal.

Regardless of these provisions, it remains your responsibility to ascertain the legality of using this website based on your jurisdiction.