I completely forgot about this blog.
My lack of ability of writing English is one of the reasons.
Writing English is not easy for me and takes a lot of time (I need some dictionaries and Google translate!). It's a bit troublesome.
Most of Japanese don't need English in daily life and neither do I.
I think it is difficult to improve your English skills -----listening, reading, speaking and writing -----if you don't need them in everyday life or work. Especially speaking and writing skills are hard.
It is not impossible but requires a lot of effort.
Anyway, I have Eiken Pre-1st grade and a TOEIC score of 850 points without study abroad experience. I think it's possible for you if you are in your 20s. I got them in my 30s.
photo AC