Japan needs international license. you can easily get it from JPJ, pay RM150 valid for one year. Google up on the process.

BTW, i read some news saying the Fukushima radiation getting worse? Am going to Tokyo coming April, abit worried.

Just got back from Japan (Osaka/Kyoto/Tokyo). Some inputs below.

1. Tokyo getting hot. Around 28C now...evry shiny and super hot to jalan. Bring sun block
2. Golden week just over, so time to head to Disneyland and USJ as crowd will be less. Don't bother getting Express for USJ.
3. Remember to buy Tokyo Metro Subway passes (only for tourist) you willl save alot on transportation.
4. I always use AirBNB for japan as they usually provide free Poecket Wifi. You will need this when go out Jalan.
5. Kyoto food are expensive and yet not to my likings, not sure why is such (expensive).
6. For ladies, remember to rent Kimono in Kyoto (if not too hot) my GF enjoyed it alooott!!

i have use tocoo before (car rental and Wifi) and yes they are reliable. Response from them are also very prompt.
You can try Rakuten for car rental, heard it is cheaper

Yes..it is worth going..Golden week just over so wait time should be less....but then again...there is no low peak for USJ. I suggest you download the app which tells you your wait time and plan your target accordingly. If you are worries, you can always get the fast pass tickets but that is as exp as the entry tickt itself...

Highlight of USJ will be the newly opened minion ride and Wizarding worl of Harry Potter.