You don’t need to be in Japan to give the exam you can give it from any registered TOEFL center and give it online. I am studying TOEFL study guides but no matter how many books you have gone through it all seems too difficult for me and I must say that to survive in the American it’s a must thing you score good in the English section because it leave a good impact on the interviewer as in my case. Now there are many things which can help like the online courses and TOEFL study guides which always a win win situation for me. Now it all looks easy like grammatical and general English section is in coverage.
TOEFL test study guides