Best Online Casinos in Japan – Updated July 2025

InterCasino

$900 welcome bonus plus 110 free spins on different games!

Welcome offer:

100% Bonus up to

$300

+ 100 Free Spins

Bonus on first deposit

Terms & Conditions apply ·  Play responsibly

InterCasino

$900 welcome bonus plus 110 free spins on different games!

  • 100% Bonus up to $300 + 100 Free Spins with your first deposit (New customers)
  • Bonus available on your second and third deposit
  • Japanese players are accepted
  • Play instantly in your browser – No installation required
  • Mobile-friendly games · Enjoy playing on smartphones and tablets
  • Live Casino · Play against real croupiers at InterCasino
  • InterCasino is available in 2 languages: English and Japanese
  • Tested and certified by Casino Bonus Center · Rating: 3.1/5
  • 13 Game Providers: NetEnt, BetSoft, Games Global, NextGen Gaming, QuickSpin, Yggdrasil Gaming, IGT Interactive, Pragmatic Play, Thunderkick, Leander Games, Evolution Gaming, Play n GO, and Realistic Games

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

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 and third deposit
  • Japanese players are accepted
  • Accepts Bitcoin and other cryptocurrencies
  • Play instantly in your browser – No installation required · Optional game downloads available
  • Mobile-friendly games · Enjoy playing on smartphones and tablets
  • Live Casino · Play against real croupiers at Zodiac Casino
  • Over $2,136,303 in Progressive Jackpots
  • Available in multiple languages, including English
  • Tested and certified by Casino Bonus Center · Rating: 4.6/5
  • Popularity: This offer has been claimed by 41 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.

bitStarz

Claim up to ¥50,000 in Bonuses + 180 Free Spins!

Sign-up Bonus:

30

Free Spins

No deposit required

Terms & Conditions apply ·  Play responsibly

Explore bonuses at bitStarz

bitStarz

Claim up to ¥50,000 in Bonuses + 180 Free Spins!

  • 30 Free Spins · No deposit required
  • 100% Bonus up to ¥10,000 + 180 Free Spins with your first deposit (New customers)
  • Bonus available on your second and third deposit
  • bitStarz offers exclusive bonuses for CasinoBonusCenter visitors
  • Japanese players are accepted
  • Exclusive biggest bonuses for Japanese players
  • Accepts Bitcoin and other cryptocurrencies
  • Play instantly in your browser – No installation required
  • Mobile-friendly games · Enjoy playing on smartphones and tablets
  • Live Casino · Play against real croupiers at bitStarz
  • Over $12,259,682 in Jackpots by Games Global
  • Available in multiple languages, including English
  • Tested and certified by Casino Bonus Center · Rating: 4.6/5
  • Popularity: This offer has been claimed by 34 visitors so far this month.
  • 91 Game Providers: BitStarz Originals, Slotopia, Big Time Gaming, Playson, Boomerang Studios, NetEnt, Blue Guru Games, Playtech, VIVO Gaming, Gaming Corps, Booongo, Onlyplay, and others.

SnatchCasino

Where every spin combines beach leisure with gangster thrills!

Welcome offer:

225% Bonus up to

$1,000

+ 100 Free Spins

Bonus on first deposit

Terms & Conditions apply ·  Play responsibly

Explore bonuses at SnatchCasino

SnatchCasino

Where every spin combines beach leisure with gangster thrills!

  • 225% Bonus up to $1,000 + 100 Free Spins with your first deposit (New customers)
  • Bonus available on your second and third deposit
  • SnatchCasino offers exclusive bonuses for CasinoBonusCenter visitors
  • Japanese players are accepted
  • Accepts Bitcoin and other cryptocurrencies
  • Play instantly in your browser – No installation required
  • Mobile-friendly games · Enjoy playing on smartphones and tablets
  • Live Casino · Play against real croupiers at SnatchCasino
  • Available in multiple languages, including English
  • Tested and certified by Casino Bonus Center · Rating: 4.1/5
  • 80 Game Providers: Play n GO, Ezugi, Triple PG, OneTouch, Push Gaming, Hacksaw Gaming, Yggdrasil Gaming, Evoplay, Evolution Gaming, NetEnt, Fugaso, PG Soft, and others.

Casumo

Amazing bonuses and daily video slots tournaments!

Welcome offer:

100% Bonus up to

$400

Bonus on first deposit

Terms & Conditions apply ·  Play responsibly

Casumo

Amazing bonuses and daily video slots tournaments!

  • 100% Bonus up to $400 with your first deposit (New customers)
  • Bonus available on your second purchase
  • Japanese players are accepted
  • Play instantly in your browser – No installation required
  • Mobile-friendly games · Enjoy playing on smartphones and tablets
  • Live Casino · Play against real croupiers at Casumo
  • Online sports betting
  • Casumo is available in 3 languages: English, Finnish, and Swedish
  • Tested and certified by Casino Bonus Center · Rating: 4/5
  • 35 Game Providers: Merkur Gaming, IGT Interactive, Red Tiger, Thunderkick, Games Global, Playtech, ELK Studios, Slingo Originals, NYX Interactive, Bally Interactive, QuickSpin, Fortune Factory, and others.

StoneVegas

Step Into a Prehistoric Paradise with 200 Free Spins + Up to $500 in Bonus!

Welcome offer:

100% Bonus up to

$500

+ 200 Free Spins

Bonus on first deposit

Terms & Conditions apply ·  Play responsibly

StoneVegas

Step Into a Prehistoric Paradise with 200 Free Spins + Up to $500 in Bonus!

  • 100% Bonus up to $500 + 200 Free Spins with your first deposit (New customers)
  • Japanese players are accepted
  • Accepts Bitcoin and other cryptocurrencies
  • Play instantly in your browser – No installation required
  • Mobile-friendly games · Enjoy playing on smartphones and tablets
  • Live Casino · Play against real croupiers at StoneVegas
  • Online sports betting
  • Available in multiple languages, including English
  • Rating: 4/5
  • 93 Game Providers: Booming Games, PG Soft, Play n GO, Vibra Gaming, Zitro, Playpearls, Apparat Gaming, Playson, Big Time Gaming, Gamzix, Kiron Interactive, Slotmill, and others.

Casino Classic

First Spin Is Free – Then Get 40 More for Only $1!

Sign-up Bonus:

1

Free Spin

No deposit required

Terms & Conditions apply ·  Play responsibly

Casino Classic

First Spin Is Free – Then Get 40 More for Only $1!

  • 1 Free Spin · No deposit required
  • 40 Free Spins with your first deposit (New customers)
  • Bonus available on your second purchase
  • Japanese players are accepted
  • Accepts Bitcoin and other cryptocurrencies
  • Play instantly in your browser – No installation required · Optional game downloads available
  • Mobile-friendly games · Enjoy playing on smartphones and tablets
  • Live Casino · Play against real croupiers at Casino Classic
  • Over $2,136,303 in Progressive Jackpots
  • Available in multiple languages, including English
  • Tested and certified by Casino Bonus Center · Rating: 4.2/5
  • 39 Game Providers: Games Global, Pragmatic Play, SpinPlay Games, Evolution Gaming, Blue Ring Studios, NorthernLights Gaming, SlingShot, Alchemy Gaming, Neon Valley, Flip Five Gaming, Wishbone Games, High Limit Studio, and others.

Top 10 Online Casino Bonuses in Japan

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 July 2025. Zodiac Casino, bitStarz, and SnatchCasino 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 bonuses today!

Online Casinos JapanWelcome Bonus

80チャンスは億万長者になるために!

80 Free Spins

Claim up to ¥50,000 in Bonuses

Bonus of 100% up to ¥10,000 + 180 Free Spins

Casino Fun, Beach Vibes, Gangster Style

Bonus of 225% up to $1,000 + 100 Free Spins

Daily slots tournaments

Bonus of 100% up to $400

$900 Welcome bonus + 110 extra spins!

Bonus of 100% up to $300 + 100 Free Spins

Get a free spin on the wish wheel!

Bonus of 100% up to $1,000

Sportsbook, casino, live casino

Bonus of 100% up to $100 + 50 Free Spins

ジャックポットが当たる150回のチャンスをゲット

150 Free Spins

The best games, all in a safe place

Bonus of 100% up to $200 + 200 Free Spins

30 free spins plus ¥50,000!

Bonus of 100% up to ¥25,000

* 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.

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Established in 2006, CasinoBonusCenter.com is one of the longest-running and most trusted casino review and bonus portals online. With nearly two decades of expertise, it has become a leading source for reliable and comprehensive online gambling information. Offering accurate expert ratings, exclusive casino bonuses, and detailed reviews of hundreds of online casinos, Casino Bonus Center empowers players—whether playing for fun or real money—to make informed decisions and elevate their gaming experience.

Explore Online Casinos for Japanese players

Dive into our carefully selected library featuring 145 online casinos available in Japan. Each review is crafted with expertise, offering insights into game quality, bonuses and promotions, casino reliability, and user experience. Make an informed choice and play your favorite casino games, either for free or with real money stakes.

No-Deposit Casino Bonuses

Looking for a risk-free start? Check out our comprehensive list of no-deposit bonuses. From free spins to free money to play with, our very popular No-deposit-required Chart of Bonuses  provides a variety of options tailored for Japanese players. Experience the thrill of online casinos without opening your wallet, and if luck is on your side, keep your winnings!

Best Welcome Bonuses

Ready to elevate your gaming? Our directory is filled with the most lucrative welcome bonuses for Japanese players, offering over $110,600 in bonuses and thousands of free spins for your first deposits. Don’t miss out on these exclusive offers! Trust our expert reviews to guide you to the best deals and premium online casinos today.

Discover top-rated online casinos with the best offers this month. Our curated list ensures you access the most generous promotions and trusted casinos. From exclusive welcome packages to exciting no deposit offers, start your gaming journey with the finest online casino bonuses available in Japan.

Top-Rated Online Casinos in Japan

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