Yanga-Mbiwa admits the stress levels were high as January's arrivals battled to adjust to Premier League life and against relegation.
"It was tough and pretty complicated at times but the job was done - we stayed in the Premier League, which is what we set out to do when we arrived in January," the 24-year-old told nufc.co.uk as he looked back on his first six months in England.
"Newcastle United is a massive club which deserves to be playing Premier League football. It was a very stressful situation and we owed it to ourselves to go out there and do really well.
"What we were doing for the last few months was playing with quite a lot of pressure on our shoulders, but as soon as we beat QPR and secured our safety, things were much better.
"Even in training sessions, people were enjoying themselves because the weight was off our shoulders. It was a very tough season but we will go out next year and aim to hit the ground running and do a much better job."