Most Popular Online Casinos in July

KikoBet

Unlock a €500 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

KikoBet

Unlock a €500 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 and third deposit
  • KikoBet 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 KikoBet
  • Online sports betting
  • Available in multiple languages, including English
  • Tested and certified by Casino Bonus Center · Rating: 4.1/5
  • Popularity: This offer has been claimed by 248 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.

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

ReloadBet

Online sports and casino betting · $300 welcome bonus!

  • 100% Bonus up to $300 with your first deposit (New customers)
  • ReloadBet 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 ReloadBet
  • Online sports betting
  • Over $12,328,992 in Jackpots by Games Global
  • Available in multiple languages, including English
  • Tested and certified by Casino Bonus Center · Rating: 3.9/5
  • Popularity: This offer has been claimed by 203 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.

Rizk Casino

Spin the "Wheel of Rizk" for real rewards, no bullshit!

Welcome offer:

100% Bonus up to

$100

+ 50 Free Spins

Bonus on first deposit

Terms & Conditions apply ·  Play responsibly

Rizk Casino

Spin the "Wheel of Rizk" for real rewards, no bullshit!

  • 100% Bonus up to $100 + 50 Free Spins with your first deposit (New customers)
  • 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 Rizk Casino
  • Online sports betting
  • Available in multiple languages, including English
  • Tested and certified by Casino Bonus Center · Rating: 4/5
  • Popularity: This offer has been claimed by 162 visitors so far this month.
  • 12 Game Providers: NetEnt, Games Global, Play n GO, Thunderkick, IGT Interactive, QuickSpin, Yggdrasil Gaming, BetSoft, Williams Interactive, Evolution Gaming, ELK Studios, and NextGen Gaming

PlayOJO

Get 50 free spins straight into your account. Everything paid in cash, no wagering requirements!

Welcome offer:

50

Free Spins

Bonus on first deposit

Significant Terms: 18+ · First deposit only · Min. deposit $10 · 50 Free Spins on Book of Dead slot · Each free spin valued at $0.10 · Irregular play may lead to removal of rewards · OJO’s Rewards and Game Play policy applies · Terms & Conditions apply ·  Play responsibly

PlayOJO

Get 50 free spins straight into your account. Everything paid in cash, no wagering requirements!

  • 50 Free Spins with your first deposit (New customers)
  • 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 PlayOJO
  • PlayOJO is available in 3 languages: English, French, and Norwegian
  • Tested and certified by Casino Bonus Center · Rating: 4.1/5
  • Popularity: This offer has been claimed by 159 visitors so far this month.
  • 26 Game Providers: Merkur Gaming, NetEnt, Yggdrasil Gaming, Play n GO, NextGen Gaming, Amaya Cryptologic, Blueprint Gaming, Williams Interactive, GVG Green Valley Games, ELK Studios, Slingo Originals, IGT Interactive, and others.

GambleZen Casino

Discover Nature’s Hidden Treasures with €3,625 in Your Backpack

Welcome offer:

200% Bonus up to

€500

+ 100 Free Spins

Bonus on first deposit

Terms & Conditions apply ·  Play responsibly

GambleZen Casino

Discover Nature’s Hidden Treasures with €3,625 in Your Backpack

  • 200% Bonus up to €500 + 100 Free Spins with your first deposit (New customers)
  • Bonus available on your second and third deposit
  • GambleZen Casino 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 GambleZen Casino
  • Available in multiple languages, including English
  • Tested and certified by Casino Bonus Center · Rating: 4.2/5
  • Popularity: This offer has been claimed by 151 visitors so far this month.
  • 86 Game Providers: Platin Gaming, Ezugi, Onlyplay, OctoPlay, Fugaso, Pragmatic Play, LiveGames, XProGaming, KA Gaming, Evolution Gaming, Betsolutions, Playtech, and others.

Vera&John Casino

Plenty of excitement | $5,000 guaranteed winnings every day!

Welcome offer:

200% Bonus up to

$100

+ 100 Free Spins

Bonus on first deposit

Terms & Conditions apply ·  Play responsibly

Vera&John Casino

Plenty of excitement | $5,000 guaranteed winnings every day!

  • 200% Bonus up to $100 + 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 Vera&John Casino
  • Vera&John Casino is available in 2 languages: English and Hungarian
  • Tested and certified by Casino Bonus Center · Rating: 3.3/5
  • Popularity: This offer has been claimed by 146 visitors so far this month.
  • 16 Game Providers: NetEnt, Bally Interactive, BetSoft, Games Global, NextGen Gaming, QuickSpin, Yggdrasil Gaming, IGT Interactive, Pragmatic Play, Thunderkick, Leander Games, Evolution Gaming, and others.

Wolfy Casino

Enjoy up to $1,000 in Wager-Free Bonuses at Signup!

Sign-up Bonus:

20

Free Spins

No deposit required

Terms & Conditions apply ·  Play responsibly

Wolfy Casino

Enjoy up to $1,000 in Wager-Free Bonuses at Signup!

  • 20 Free Spins · No deposit required
  • Bonus Code: CENTER20
  • 100% Bonus up to $200 with your first deposit (New customers)
  • Bonus Code: WELCOME
  • Bonus available on your second and third deposit
  • Wolfy Casino 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 Wolfy Casino
  • Available in multiple languages, including English
  • Rating: 3.8/5
  • Popularity: This offer has been claimed by 139 visitors so far this month.
  • 108 Game Providers: Play n GO, Gamomat, Atomic Slot Lab, Galaxsys, Nemesis, iSoftBet, Casimi, Blueprint Gaming, Amigo, BGaming, Thunderkick, Oryx Gaming, and others.

Top 10 Online Casino Bonuses in Japan (July 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 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.