Name: Sei Yotsuba (Pen name)
Age: undisclosed, but very experienced (30 years of learning English (with interruptions))
Location: Tokyo, Japan
Job: Engineer (research, planning, and education of young people)
Work Environment: surrounded with many smart people and TOEIC score 990 (perfect score) holders. In fact, I’m in a narrow position.
Hobby: Great detective (and a few mystery novels).
People I admire: Katsu Kaishu and Sherlock Holmes.
English Proficiency: mainly reading and writing, but I can score 495 (full score) on the TOEIC level. Overall: 950; I took the Practical English Proficiency Test when I was young and passed the Pre-1 level.
Fields of weakness: languages, music, and art. Worked hard for several decades to finally get the hang of English and achieve a score of 950. (In other words, he knows a lot about how English learners with no sense can effectively improve their English language skills.)
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