You can be pretty sure that the car uses
JIS Metric Standard for hardware (being a Japanese made car and all).
99% of things you do on the car, you will encounter the following:
- 10 mm, 12 mm, 14 mm, 17 mm, 19mm, 22mm (hex head bolts)
Not many components use hardware outside that range. Though, here are some exceptions that you will encounter if you will be taking on long term maintenance for the car:
- 32mm (Axle Nut)
- 10mm Allen Key/Hex Bit (Transmission & Differential drain bolts)
The car hasn't needed etorx bits since MY2017, when they changed the seat bolts to regular hex head
Shit kinda hits the fan when you start adding aftermarket parts. Companies vary where they get their hardware from, so the socket sizes will differ from JIS (usually ISO or DIN), sometimes even including SAE!
---------------
If you don't already have a toolkit, I recommend the
Harbor Freight 301 pc Mechanic's set (especially right now that Harbor Freight has a 25% off any single item coupon!).
It has practically everything on the above list and then some, with almost no missing pieces, and a bunch of other handy stuff to have.
I bought one when I first started wrenching, and haven't needed to add much to it other than specialty and quality-of-life type tools. The single exception is that it's missing a 14mm combo wrench, but that's easy to add.