Sportsbook reviews: Free bets and betting bonuses

888Casino

Get up to $1,000 in bonus with your first deposit

Sign-up Bonus:

1

Free Spin

No deposit required

Terms & Conditions apply ·  Play responsibly

888Casino

Get up to $1,000 in bonus with your first deposit

  • 1 Free Spin · No deposit required
  • 100% Bonus up to $1,000 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 · Optional game downloads available
  • Mobile-friendly games · Enjoy playing on smartphones and tablets
  • Live Casino · Play against real croupiers at 888Casino
  • Online sports betting
  • Play poker online at 888Casino – Online poker room
  • Available in multiple languages, including English
  • Tested and certified by Casino Bonus Center · Rating: 4.9/5
  • Popularity: This offer has been claimed by 171 visitors so far this month.
  • 27 Game Providers: Playtech, Section8, NetEnt, Williams Interactive, Big Time Gaming, Play n GO, Wizard Games, Electracade, GTECH G2, Amaya Cryptologic, GTS, Pragmatic Play, and others.

Betsson

Sports betting, online casino, poker, scratch cards and more!

Welcome offer:

100% Bonus up to

$100

+ 50 Free Spins

Bonus on first deposit

Terms & Conditions apply ·  Play responsibly

Betsson

Sports betting, online casino, poker, scratch cards and more!

  • 100% Bonus up to $100 + 50 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 Betsson
  • Online sports betting
  • Play poker online at Betsson – Online poker room
  • Available in multiple languages, including English
  • Tested and certified by Casino Bonus Center · Rating: 4.8/5
  • Popularity: This offer has been claimed by 69 visitors so far this month.
  • 95 Game Providers: Light and Wonder, Playson, Blueprint Gaming, Old Skool, Slingo Originals, Gamomat, Leander Games, High 5, Genesis, Side City Studios, iSoftBet, RELIGA, and others.

betsafe

Experience the thrill of sports betting and the excitement of the best casino games
Learn more about betsafe

Terms & Conditions apply ·  Play responsibly

betsafe

Experience the thrill of sports betting and the excitement of the best casino games

  • 100% Bonus up to $200 + 200 Free Spins with your first deposit (New customers)
  • Japanese players are accepted
  • 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 betsafe
  • Online sports betting
  • Play poker online at betsafe – Online poker room
  • Available in multiple languages, including English
  • Tested and certified by Casino Bonus Center · Rating: 4.5/5
  • Popularity: This offer has been claimed by 155 visitors so far this month.
  • 138 Game Providers: Relax Gaming, TouchStone Games, High 5, Fortune Factory, Playtech, Bad Dingo, WinFast Games, Wizard Games, Skywind, Print Studios, Apollo Games, MahiGaming, and others.

NordicBet

Experience the ultimate Nordic casino and sports betting!

Welcome offer:

100% Bonus up to

€500

+ 100 Free Spins

Bonus on first deposit

Terms & Conditions apply ·  Play responsibly

NordicBet

Experience the ultimate Nordic casino and sports betting!

  • 100% Bonus up to €500 + 100 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 NordicBet
  • Online sports betting
  • Play poker online at NordicBet – Online poker room
  • NordicBet is available in 3 languages: Danish, English, and Swedish
  • Tested and certified by Casino Bonus Center · Rating: 4.3/5
  • 143 Game Providers: PG Soft, Playtech, Slotmill, Pulse 8 Studios, Betradar, Switch Studios, Thunderkick, Apollo Games, Rabcat, Endorphina, TouchStone Games, Silverback, and others.

BetHog

Unlock a $5,000 Bonus, Weekly Lotteries, and Original Games at a Trusted Crypto Casino

Welcome offer:

100% Bonus up to

$5,000

Bonus on first deposit

Terms & Conditions apply ·  Play responsibly

BetHog

Unlock a $5,000 Bonus, Weekly Lotteries, and Original Games at a Trusted Crypto Casino

  • 100% Bonus up to $5,000 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 BetHog
  • Online sports betting
  • Available in multiple languages, including English
  • Tested and certified by Casino Bonus Center · Rating: 4.2/5
  • 28 Game Providers: Slotmill, Evolution Gaming, Big Time Gaming, GameArt, OneTouch, VoltEnt, PG Soft, Booming Games, NowNow, NetEnt, BetHog Originals, TrueLab Games, and others.

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 411 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.

Rollino

Enter the Fairground with an Exclusive Bonus up to $6,000!

Welcome offer:

200% Bonus up to

$3,000

+ 100 Free Spins

Bonus on first deposit

Terms & Conditions apply ·  Play responsibly

Rollino

Enter the Fairground with an Exclusive Bonus up to $6,000!

  • 200% Bonus up to $3,000 + 100 Free Spins with your first deposit (New customers)
  • Bonus available on your second and third deposit
  • Rollino offers exclusive bonuses for CasinoBonusCenter visitors
  • 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 Rollino
  • 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 329 visitors so far this month.
  • 85 Game Providers: 1X2gaming, Platipus, Red Rake, Spinmatic, VIVO Gaming, High 5, Amatic, Pragmatic Play, Playbro, ThunderSpin, Barbara Bang, Thunderkick, and others.

Top 10 Online Casino Bonuses in Japan (June 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 June 2025. bitStarz, Zodiac Casino, 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

Claim up to ¥50,000 in Bonuses

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

80チャンスは億万長者になるために!

80 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.