Do you think taking up education in your mother tongue is better than english ?

I think this depends on where you live. If you live in a non-English speaking country and you like living there and plan to stay there, by all means learn in your own language rather than English. However, some people try to come to the United States and never learn English and don't even want their kids to learn English. If that's the case, I think that doesn't do anything good for you, it just holds you back. If I was going to move to say, Japan (I just picked Japan since that's your example), I would of course learn Japanese rather than just go there speaking English and hoping that people will be able to somehow understand me (even though I'm sure a lot would, but if I was going to permanently live there I would plan to learn the language).

umm i would be tempted to say yes but the truth is that english is a much more universal language. and besides you dont need to learn your mothertongue because you most often use it at home. this way you can stay connected with your roots as well as earn a place for yourself in the world.

Sure, you need to learn your own language before you learn others... It's much easier to learn in your language but you should have basic knowledge of other languages... for example, I'm Portuguese but some books we use in university are written in english.