Monopoly: Isekai Tycoon

Frederic Kohl Newman who retired after working in a hotel in USPA, decided to travel back to Earth and live the rest of his life, however, as he purchased an old property in Japan, he discovered a strange necklace and accidentally opened a gate to another world!? What is Frederic's plan as he somehow, possessed an item that leads into another world? Read the book to find out!