Extending Working Visa by a non-EU foreigner in Poland

I know that there are similar topics but I couldnt find the answer to this one.

First I want to know if its possible for foreigner (NON EU-JAPAN) to get a working permit/visa for poland for more than one year.

Also, I want to know if you want to extend the working permit/visa for poland because your work contract is extended, then where do you need to go get your visa extended?

Do I need to go back to my home country and go to Polish embassy like I did the first time, or could I just do it in Poland?

Usually no, but it's not unheard of for it to be granted for longer. However, a year in the first instance is normal.

You have to go to the Foreigners Office for the relevant Voivodeship and apply there for an extension - all quite painless, as long as you have the paperwork in order.

EU citizens get better treatment when applying for residence cards.

Is it possible to extend Business Visa of 60 days to 90 days after reaching Poland?