The lore is deep

Some special characters you might see include Y, which is only issued to Americans in Japan under the SOFA agreement; A, which is the same as Y but for kei cars; and E, which is assigned to cars imported to Japan that haven't had Japanese sales tax paid for them.

Another thing with special characters is that they only use hiragana without a dakuten. For instance, you will see fu (ふ) but never bu (ぶ) or pu (ぷ).

For the car classification codes, 500 series plates also have to fit within specified dimensions for compact cars. A notable example is the Evo IV, a 500 series car, being succeeded by the Evo V, whose flared wheel arches made it too wide to be classed as a compact car, so they had to wear 300 series plates.

Some other common plate numbers from my experience living in Japan are 80-08 (haha boob), 33-33 or 3-33 which were common with the yakuza before the major crackdowns happened (88-88 and 8-88 were also common)

i also recomend looking up lists of example goroawase! goroawase being the name for the number based wordplay! another classic example that feels on topic is 23 being nissan, and 3923 being thank you nissan. i used 9071 kurenai / crimson for my crimson ae86

Great Info

i've put on my plates 413, 44-13, 13-44 or 44-44. i know they would never be really registered in real life, but it fits the character i've done in game.

Sweet intel, emerging in this game I like the idea of actually adding stuff with a little sense to it. Thank you guys for clearing this up. :)

Thank you for the correction. Also there will be more updates coming soon.

In the Kanto region, "ろ" is mainly assigned to license plates with illuminated characters.
Rental cars are "わ" and "れ".

Hiragana is not used for diplomatic vehicles.

Hyphens are only used with four digits, not with three digits or less. Also, you cannot choose whether to use a hyphen or not.