Couldn't find the gear ratios on here so i did some research and this is what i have found. First result is the one for our car and then i found a few variants of it and have also included some of the common replacement gearboxes that people use these days in our cars. Still searching for info on the auto gearboxes but gimme a break its 3am.

~Manuals~

J160 6/MT found in the AS200 and RS200
First Gear: 3.874
Second Gear: 2.175
Third Gear: 1.484
Fourth Gear: 1.223
Fifth Gear: 1.000
Sixth Gear: 0.869

J160 6/MT found in the Nissan S15
First Gear: 3.626
Second Gear: 2.200
Third Gear: 1.541
Fourth Gear: 1.213
Fifth Gear: 1.000
Sixth Gear: 0.767

J160 6/MT found in the Mazda RX8
First Gear: 3.760
Second Gear: 2.269
Third Gear: 1.645
Fourth Gear: 1.187
Fifth Gear: 1.000
Sixth Gear: 0.843

J160 6/MT found in the Mazda MX5
First Gear: 3.760
Second Gear: 2.269
Third Gear: 1.645
Fourth Gear: 1.257
Fifth Gear: 1.000
Sixth Gear: 0.843

J160 6/MT TRD Gear Set
First Gear: 3.106
Second Gear: 2.175
Third Gear: 1.585
Fourth Gear: 1.223
Fifth Gear: 1.000
Sixth Gear: 0.869

J160 6/MT Nismo Gear Set
First Gear: 2.9071
Second Gear: 1.9888
Third Gear: 1.5373
Fourth Gear: 1.2179
Fifth Gear: 1.0000
Sixth Gear: 0.8624

W58 5/MT found in the Toyota Mk2 Celica Supra, Mk3 & Mk4 Supra (non turbo), Mk3 Toyota Cressida, Mk2 Toyota Soarer, Mk3 Toyota Celica & Lotus Excel
Weighs: 35 kg
First Gear: 3.285
Second Gear: 1.894
Third Gear: 1.275
Fourth Gear: 1.00
Fifth Gear: 0.783
Reverse: -3.768

R154 5/MT found in Mk3 Supra Turbo and Mk3 Toyota Soarer Turbo
Weighs: 45.5 kg
First Gear: 3.250
Second Gear: 1.955
Third Gear: 1.310
Fourth Gear: 1.00
Fifth Gear: 0.753
Reverse: -3.180

V160 6/MT found in Mk4 Supra Turbo Series 1
First Gear: 3.830
Second Gear: 2.360
Third Gear: 1.680
Fourth Gear: 1.310
Fifth Gear: 1
Sixth Gear: 0.790
Reverse: -3.280

V161 6/MT found in Mk4 Supra Turbo Series 2
First Gear: 3.724
Second Gear: 2.246
Third Gear: 1.541
Fourth Gear: 1.205
Fifth Gear: 1
Sixth Gear: 0.818

~Automatics~

A650E 5/AT found in IS300
First Gear: 3.357
Second Gear: 2.180
Third Gear: 1.424
Fourth Gear: 1.000
Fifth Gear: 0.753
Reverse: -3.266
Max Power Rating: 325 wheel horse power