Complex sentence: Eventually a representative from the Japanese Ministry of Welfare named Heita Kawada (Kusanagi) appears, whose job is to investigate this phenomenon, which begins to be seen not in just the two isolated cases, but in various locations around the city.
Split into simpler sentences: Eventually a representative from the Japanese Ministry of Welfare named Heita Kawada (Kusanagi) appears. It is his job to investigate this phenomenon, which begins to be seen not in just the two isolated cases, but in various locations around the city.