Complex sentence: The dominant nexus of hikikomori centers on the transformation from youth to the responsibilities and expectations of adult life--indications are that advanced industrialised societies such as modern Japan fail to provide sufficient meaningful transformation rituals for promoting certain susceptible types of youth into mature roles.
Split into simpler sentences: The dominant nexus of hikikomori centers on the transformation from youth to the responsibilities and expectations of adult life. Indications are that advanced industrialised societies such as modern Japan fail to provide sufficient meaningful transformation rituals for promoting certain susceptible types of youth into mature roles.