Hajime Moriyasu's men beat two ex-world champions Spain and Germany en route to securing top spot in Group E with six points from their three outings.
On the other hand, Zlatko Dalic's men rode their luck in their final Group F contest against Belgium which ended in a 0-0 draw and saw them finish as runners-up to Morocco.
Ahead of Monday's meeting between Japan and Croatia, Sports Mole looks at how the squads of the two nations stack up against each other.
JAPAN
Most valuable player:
Daichi Kamada (£26m)
Overall squad value:
£133.4m
Most capped player:
Yuto Nagatomo (136)
Leading goalscorer:
Takumi Minamino (17)
Total caps:
962
Total goals:
90
Oldest player:
Eiji Kawashima (39)
Youngest player:
Takefusa Kubo (21)
Average age:
27.8
SQUAD IN FULL
Goalkeepers: Eiji Kawashima (Strasbourg), Shuichi Gonda (Shimizu S-Pulse), Daniel Schmidt (Sint-Truidense)
Defenders: Yuto Nagatomo (Tokyo FC), Maya Yoshida (Schalke 04), Hiroki Sakai (Urawa Red Diamonds), Shogo Taniguchi (Kawasaki Frontale), Miki Yamane (Kawasaki Frontale), Ko Itakura (Borussia Monchengladbach), Takehiro Tomiyasu (Arsenal), Hiroki Ito (Stuttgart)
Midfielders: Gaku Shibasaki (Leganes), Wataru Endo (Stuttgart), Junya Ito (Reims), Takumi Minamino (Monaco), Hidemasa Morita (Sporting Lisbon), Daichi Kamada (Eintracht Frankfurt), Yuki Soma (Nagoya Grampus), Kaoru Mitoma (Brighton & Hove Albion), Ritsu Doan (Freiburg), Ao Tanaka (Fortuna Dusseldorf), Takefusa Kubo (Real Sociedad)
Forwards: Takuma Asano (Bochum), Daizen Maeda (Celtic), Ayase Ueda (Cercle Brugge), Shuto Machino (Shonan Bellmare)
CROATIA
Most valuable player:
Josko Gvardiol (£52m)
Overall squad value:
£326.8m
Most capped player:
Luka Modric (158)
Leading goalscorer:
Andrej Kramaric (19)
Total caps:
1024
Total goals:
129
Oldest player:
Luka Modric (37)
Youngest player:
Luka Sucic (20)
Average age:
27.4
SQUAD IN FULL
Goalkeepers: Dominik Livakovic (Dinamo Zagreb), Ivo Grbic (Atletico Madrid), Ivica Ivusic (Osijek)
Defenders: Josip Stanisic (Bayern Munich), Borna Sosa (Stuttgart), Josko Gvardiol (RB Leipzig), Dejan Lovren (Zenit St Petersburg), Borna Barisic (Rangers), Domagoj Vida (AEK Athens), Josip Juranovic (Celtic), Martin Erlic (Sassuolo), Josip Sutalo (Dinamo Zagreb)
Midfielders: Luka Modric (Real Madrid), Mateo Kovacic (Chelsea), Marcelo Brozovic (Inter Milan), Mario Pasalic (Atalanta BC), Nikola Vlasic (Torino), Kristijan Jakic (Eintracht Frankfurt), Lovro Majer (Rennes), Luka Sucic (Red Bull Salzburg)
Forwards: Ivan Perisic (Tottenham Hotspur), Andrej Kramaric (Hoffenheim), Marko Livaja (Hajduk Split), Bruno Petkovic (Dinamo Zagreb), Mislav Orsic (Dinamo Zagreb), Ante Budimir (Osasuna)
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