Hello and thank you very much guys for the help!

It is not an e-stay as you will see.

Here i made a quick representation of the bike frame (the shop was closed a few times i went to get a picture and i'm not waiting anymore):
http://kaigaraonline.files.wordpress...ube_or_not.jpg

What brand can this be and what type of bike is it?

Thank you very much!

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