Here's a big 'ol list of Japanese cars ranked by their power/weight (actually weight/power). In general I tried to find the best example of each car, I didn't want to go all "Gran Turismo and have a dozen of each model. As always power/weight isn't necessarily a perfect picture of a car's performance, but it makes for some interesting comparisons. Cars that are italisized have a questionable production and/or road legal status. Note the Camry V6 as a reference

Here's the American list if you missed it last week

Mazda AZ-163158725.19
Honda CRZ130266320.48
Honda CRX Si (US)108217420.13
Toyota Celica Supra (mk2)150300020.00
Nissan 280Z145282419.48
Mazda RX-7 (84)135250018.52
Nissan 240SX155280018.06
Nissan Sentra SE-R140246717.62
Toyota AE86128214916.79
Mazda Cosmo Sport 110126211616.79
Toyota 2000GT150246916.46
Toyota MR2 Spyder138219515.91
Mazda Miata (NA)138219515.91
Mitsubishi Starion190300015.79
Nissan 280ZX180282415.69
Mitsubishi Eclipse GSX210327015.57
Nissan Sentra SE-R200310915.55
Mazda RX7 Turbo200307115.36
Datsun 240Z151230215.25
Subaru SVX231351015.19
Nissan 300ZX Turbo (Z31)200302715.14
Mitsubishi Starion Turbo197298015.13
Mitsubishi Eclipse GSX210315715.03
Mitsuoka Orochi233348314.95
Mazda Miata (NC)167248014.85
Honda Prelude Type SH200295414.77
Honda Civic Si ('14)205300314.65
Toyota Supra Turbo (mk3)232338914.61
Acura RSX Type S201284014.13
Honda Civic Type R (FN2 Europe)198278414.06
Toyota Celica GTS180250013.89
Honda CRX Si (JDM)157217413.85
Scion FR-S/Subaru BRZ200276213.81
Mazda Miata Mazdaspeed (NB)180246913.72
Mitsubishi Galant VR4246335113.62
Mitsubishi Eclipse GT265360913.62
Mitsubishi FTO197268413.62
Honda/Acura Integra Type R195263913.53
Honda Civic Type R (EP3)197265713.49
Mazda Mazdaspeed6270361813.40
Toyota MR2 Turbo200265713.29
Toyota Celica GT-Four ST205239317513.28
Honda Civic Type R (EK9)182235912.96
Toyota Camry V6 (control)268346012.91
Mazda Eunos Cosmo276354912.86
Mazda RX8 237302712.77
Mazda Familia 323 GTR210266812.70
Lexus SC400290365512.60
Mazda Mazdaspeed3 263328112.48
Subaru Impreza WRX ('14)265326912.34
Nissan Skyline GT-R (R33)276340012.32
Nissan Skyline GT-R (R34)276338612.27
Mitsubishi Lancer EVO GSR291352712.12
Nissan Pulsar Gti-R227269011.85
Toyota Blade Master 276325611.80
Mitsubishi 3000GT VR-4320376011.75
Honda S2000240280911.70
Nissan 300ZX Twin Turbo (Z32)300347411.58
Nissan Skyline GT-R (R32)276314611.40
Mitsubishi Lancer Evolution VII276308611.18
Nissan 350Z300333911.13
Subaru Impreza WRX STI (GR)305339511.13
Mazda RX7 Turbo (FD)255282611.08
Nissan Silvia R spec247273411.07
Mitsubishi Lancer Evolution I247273411.07
Subaru Impreza WRX STI ('14)305336611.04
Subaru Impreza WRX STI (GD)300326310.88
Mitsubishi Lancer Evolution II256275610.77
Ifiniti G35/Q60348372710.71
Toyota Supra Turbo (mk4)320341510.67
Honda NSX290306610.57
Mitsubishi Lancer Evolution III266277810.44
Honda NSX Type R276280010.14
Subaru Impreza WRX STI 22B280280010.00
Nissan 370Z33232279.72
Infiniti M45/Q7042040289.59
Nissan 370Z NISMO35033469.56
Lexus IS F41637809.09
Nissan Skyline GT-R NISMO 400R40034178.54
Mitusbishi Lancer Evolution X FQ40040334398.53
Lexus RC450F46739588.48
Nissan Juke R48540008.25
Nissan GTR (R35)54538277.02
Nissan GTR (R35) NISMO59538276.43
Lexus LFA55332635.90
Nissan R390 GT155024204.40
Tommy Kaira ZZII54222054.07
Toyota GT One Road Car60019843.31