would getting a tutor for Japanese be necessary to get 40+ raw? :\
Can your own willpower drive you to get there (lets say you find the subject as a hobby more than a subject itself)
or is it the lack of having conversation practice/someone to go over grammar with you = drawback?
It's defs not necessary to get 40+ raw, but I personally found having a tutor beneficial, mainly as a Japanese person to talk to because I didn't really know any Japanese people, and in my class the teacher spoke mainly English, which wasn't good. Most of my sessions with my tutor ended up just being talking about random stuff in Japanese, without any real structure. I tried other tutors, including VCAA examiners but I found that teachers that have been in the VCE Japanese system for too long tend to speak too much English to you (a habit formed in class I guess), and teach Japanese in a "VCE" way, which isn't really that beneficial. If you do get a tutor, I would recommend getting someone who's come from Japan recently, as it's more likely they will speak to you in all Japanese rather than English + some Japanese. Also, they will most likely be cheaper than a current VCE Japanese teacher at a school ^^;
You also have to remember that getting above 40 raw isn't really
that tied to Japanese ability. You could be incredibly good at Japanese but still get below 40. Likewise you could be not that incredible and get much higher. I've met a Japanese person born in Australia, with very, very fluent Japanese yet she only got 38 raw, when she was clearly
much better than me at Japanese. I've also heard of someone who's passed
JLPT1 getting 43. I found that a lot of getting a high score in Japanese is sadly (or happily, for me =p), exam technique and preparation. A tutor couldn't help you too much with exam technique; it's mainly something you have to discover yourself from spamming VCAA/JLTAV/Leading Edge exams.