For an academic essay at university, this would be my take on it:
It is submitted that we, the Japanese people, are losing sight of the purpose of living and the way of life in this peaceful and plentiful country. At the same time, due to the lack of guidance, significant changes are emerging in Japan and the rest of the world, which are becoming problems that need immediate resolution. Consequently, these critical issues flood and envelop us.
Note: The given English text was the basis and I did not go into the accuracy of the Japanese-English translation.
If you decide to use the first-person, use 'I argue' or 'I submit that...' I usually prefer 'It is submitted...' Don't use 'I think' or 'In my opinion...' Other alternatives include 'It can be argued that...'
Basically, 'issue' is more severe and long-term than 'problem', but most academics often use 'issue' for the sake of emphasizing their argument.