Although I was pessimistic about the result of TOEFL, actually I got 102 score.
That's was rather higher than my expectation and I felt there was still much room for improvement.
Since I thought I would have to take TOEFL again to get 100+ score, I registered TOEFL before my score report became available.
I will take TOEFL again this coming Saturday.
The fact I successfully got 100+ score made me much more confident than before.
Now, I'm confident about my English skills to the extent that I consider MBA as a not so distant future option to me.
I took part in a couple of MBA events including info sessions.
To my surprise, some of the Japanese Alumni of Cambridge Judge Business School had a strong Japanese accent and their English was far from perfect.
It seems to me I can catch up with them at least in terms of English skills!
Referral and Tuition are two main obstacles that I have to surmount to get enrolled in business school.
Of course, GMAT score and GPA can be problem to me but I don't worry so much about them.
Working experience is one of the more serious problems than them because I don't work for a renowned company nor I have managerial role.
However, as Mark Twain said, confidence makes everything possible.
All you need in this life is ignorance and confidence, and then success is sure!