The name of the field is Kilon koulun hiekkatekonurmikenttä
Aspelininkuja 3b,02630, Espoo https://www.espoo.fi/fi/toimipisteet/kilon-koulun-hiekkatekonurmikentta

This area is not Nuijalapuisto but it is Kellarimäki. Nuijalapuisto is located next to the north
https://kartat.espoo.fi/

I will correct more, area info based on official espoon map (source included)
it's a park territory, i'll correct some vegetation